This lecture discusses the medieval Christian thinker, monk, and bishop, Anselm of Canterbury's work, the Proslogion, and focuses on his discussion in chapters 14, 18, and 23 of divine simplicity, further developing the "one argument" and the logic of "that than which nothing greater can be thought". God's simplicity is beyond what we understand as simplicity of created things, and means that every thing that God is, is the same as every other thing God is. This simplicity extends as well into the divine trinity. 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 3,000 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler