

Sadler's Lectures
Lectures on classic and contemporary philosophical texts and thinkers by Gregory B. Sadler
I'm that YouTube Philosophy Guy! Find more than 3,000 videos in my main channel. Support my video and podcast work! https://www.patreon.com/sadler or https://www.buymeacoffee.com/A4quYdWoM
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Due to popular demand - and with the work underwritten by my Patreon supporters - I have been converting my videos into MP3 files listeners can listen to anywhere they want!
I have a second podcast, Mind & Desire, publishing original episodes on a variety of topics in philosophy, which you can find here - https://gregorybsadler.substack.com/podcast
Learn more about this podcast channel - https://youtu.be/qRvL0gqlyrw and https://gregorybsadler.substack.com/p/the-sadlers-lectures-podcast
Due to popular demand - and with the work underwritten by my Patreon supporters - I have been converting my videos into MP3 files listeners can listen to anywhere they want!
I have a second podcast, Mind & Desire, publishing original episodes on a variety of topics in philosophy, which you can find here - https://gregorybsadler.substack.com/podcast
Episodes
Mentioned books

Oct 9, 2025 • 14min
Thomas Hobbes, Leviathan - The Ends Of Discourse - Sadler's Lectures
This lecture discusses key ideas from the modern philosopher Thomas Hobbes' work Leviathan
It focuses specifically on chapter 7, where he identifies and discusses what he calls the ends of mental and verbal discourse, and clarifies when the discourse people engage in results in mere opinion or produces something more reliable that that, i.e. knowledge or science.
To support my ongoing work, go to my Patreon site - www.patreon.com/sadler
If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM
You can find over 3500 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler
Purchase Thomas Hobbes' Leviathan - amzn.to/3uhKmDE

Oct 8, 2025 • 17min
Thomas Hobbes, Leviathan - Simple Passions Diversified - Sadler's Lectures
This lecture discusses key ideas from the modern philosopher Thomas Hobbes' work Leviathan
It focuses specifically on on the second part of chapter 6, where Hobbes tells us that the basic passions are diversified into a number of other passions in four main manners.
1. called from the opinion men have of the likelihood of attaining what they desire
2. from the object loved or hated
3. from the consideration of many of them together
4. from the alteration or succession itself
He also discusses how passions figure into what he calls "deliberation" and makes the claim that a person's "will" is simply the last passion in the succession that determines their action. H finishes by discusses different modes of language by which people signify what their passions are.
To support my ongoing work, go to my Patreon site - www.patreon.com/sadler
If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM
You can find over 3500 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler
Purchase Thomas Hobbes' Leviathan - amzn.to/3uhKmDE

Oct 7, 2025 • 15min
Thomas Hobbes, Leviathan - Motion, Endeavor, and Passions - Sadler's Lectures
This lecture discusses key ideas from the modern philosopher Thomas Hobbes' work Leviathan
It focuses specifically on chapter 6, in which Hobbes develops his basic philosophy of human and animal action, which stems from the senses and movements of the body, and then flows into endeavor of appetite and aversion. These then give rise to other affects such as love, contempt, and hatred, joy and grief, and to differing judgements about various forms of good and evil.
To support my ongoing work, go to my Patreon site - www.patreon.com/sadler
If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM
You can find over 3500 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler
Purchase Thomas Hobbes' Leviathan - amzn.to/3uhKmDE

Oct 5, 2025 • 17min
Thomas Hobbes, Leviathan - Reason and Science - Sadler's Lectures
This lecture discusses key ideas from the modern philosopher Thomas Hobbes' work Leviathan
It focuses specifically on chapter 5, where he examines in detail what reason or reasoning is, and what science is. Hobbes views reasoning as something analogous to "reckoning" by adding and subtracting sums, not just of numbers, but of many other things as well, in particular names, conjunctions of them into "consequences", and ultimately entire arguments or syllogisms.
To support my ongoing work, go to my Patreon site - www.patreon.com/sadler
If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM
You can find over 3500 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler
Purchase Thomas Hobbes' Leviathan - amzn.to/3uhKmDE

Oct 4, 2025 • 16min
Thomas Hobbes, Leviathan - Names, Consequences, and Definitions - Sadler's Lectures
This lecture discusses key ideas from the modern philosopher Thomas Hobbes' work Leviathan
It focuses specifically on chapter 4, where a number of different sorts of "names" (or terms) are distinguished, as well as how those names can be combined into "consequences", and have their significations clarified through definitions.
To support my ongoing work, go to my Patreon site - www.patreon.com/sadler
If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM
You can find over 3500 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler
Purchase Thomas Hobbes' Leviathan - amzn.to/3uhKmDE

Oct 3, 2025 • 18min
Thomas Hobbes, Leviathan - Human Discourse - Sadler's Lectures
This lecture discusses key ideas from the modern philosopher Thomas Hobbes' work Leviathan
It focuses specifically on chapters 3 and 4, where Hobbes discusses mental and verbal discourse, that is the train of thoughts in our minds and the verbal expressions of those thoughts. Hobbes also notes that when our train of thoughts is not motivated by some desire or passion, it tends to be looser and less regulated, but when there is some goal in mind, it is oriented towards and regulated by that goal.
To support my ongoing work, go to my Patreon site - www.patreon.com/sadler
If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM
You can find over 3500 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler
Purchase Thomas Hobbes' Leviathan - amzn.to/3uhKmDE

Oct 2, 2025 • 14min
Thomas Hobbes, Leviathan - Sense and Imagination - Sadler's Lectures
This lecture discusses key ideas from the modern philosopher Thomas Hobbes' work Leviathan
It focuses specifically on chapters 1 and 2 of the work, where he develops a clearly committed empiricist and materialist epistemology, which begins with sense perception which then gives rise to imagination and memory, which can also then lead to dreams, experience, and other more complex phenomena.
To support my ongoing work, go to my Patreon site - www.patreon.com/sadler
If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM
You can find over 3500 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler
Purchase Thomas Hobbes' Leviathan - amzn.to/3uhKmDE

Oct 1, 2025 • 21min
Poul Anderson - Of Thud And Blunder - Sadler's Lectures
This lecture discusses key ideas from the 20th century American science fiction and fantasy author Poul Anderson's essay "Of Thud And Blunder", which begins by parodying a passage of swords and sorcery fantasy. While making exceptions for L. Sprague de Camp, Fritz Leiber, and J.R.R. Tolkein, Anderson criticizes many of the heroic, historical, or swords & sorcery fantasy fiction for engaging in bad storytelling. He charges them with oversimplifying, not engaging in needed research, and not devoting thought or common sense to their story writing.
He discusses a number of different matters that a fantasy author should attend to, including: social classes and the lives of producers, the nature of pre-modern cities, diseases and sanitation, politics and religion, travel by land and water, and arms, armor, combat, and poisons.
To support my ongoing work, go to my Patreon site - www.patreon.com/sadler
If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM
You can find over 3,500 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler
Read Of Thud And Blunder - https://www.sfwa.org/2005/01/04/on-thud-and-blunder/

Sep 30, 2025 • 15min
Cicero On The Nature Of The Gods book 2 - For The Sake Of Rational Beings - Sadler's Lectures
This lecture discusses key ideas from the ancient philosopher and statesman Marcus Tullius Cicero's work, On The Nature Of The Gods, which critically examines Epicurean, Stoic, and Skeptic perspectives on matters of theology and cosmology
Specifically it focuses upon the presentation of Stoic cosmology and theology by Quintus Lucilius Balbus in book 2, and in particular on his discussion of how the things at the various hierarchically arranged degrees of being exist "for the sake of" (causa in Latin) other things. Plants, which are at the lowest level, are there for both human beings (as cultivated) and for animals, and the otehr non-rational animals exist for the sake of rational beings, which are human beings and the gods.
To support my ongoing work, go to my Patreon site - www.patreon.com/sadler
If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM
You can find over 3,500 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler
Purchase Cicero's On The Nature Of Gods - amzn.to/3JITSZc

Sep 29, 2025 • 10min
Cicero On The Nature Of The Gods book 2 - Providence And Individuals - Sadler's Lectures
This lecture discusses key ideas from the ancient philosopher and statesman Marcus Tullius Cicero's work, On The Nature Of The Gods, which critically examines Epicurean, Stoic, and Skeptic perspectives on matters of theology and cosmology
Specifically it focuses upon he presentation of Stoic cosmology and theology by Quintus Lucilius Balbus in book 2, and in particular on his discussion of the question whether the providential ordering of matters by the gods extends to the human race just in general, or whether it extends to care for individuals. Another question that gets passed over but which is important to explore is whether providential care for individuals would be for all human individuals as individuals, or just some human individuals but not others.
To support my ongoing work, go to my Patreon site - www.patreon.com/sadler
If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM
You can find over 3,500 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler
Purchase Cicero's On The Nature Of Gods - amzn.to/3JITSZc