Welcome to the Huberman Lab podcast where we discuss science and science-based tools for everyday life. I'm Andrew Huberman and I'm a professor of neurobiology and ophthalmology at Stanford School of Medicine. My guest today is Robert Green. Robert Green is an author who has written more than five best-selling books, including The 48 Laws of Power, The Laws of Human Nature and Mastery. He did his bachelor's training at the University of California, Berkeley and the University of Wisconsin at Madison. Robert Green's books are both unique and important for several reasons, not the least of which is that they explore the interaction between the psychology of self, self-exploration and the psychology of human interaction, all rooted in history and modern culture, and at the same time in a way that pertains to everybody. I first learned about Robert's work from reading the book Mastery, which to my mind is a brilliant exploration and a practical tool for how to think about and pursue one's purpose. Whenever I'm asked for book suggestions, I always include mastery in my top three recommendations. During today's discussion, we cover a wide range of topics, including how to find and pursue and achieve one's purpose. We talk about the selection of a life partner, as well as romantic and other types of relationships. We also discuss the topics of motivation and urgency and this concept of death ground, which arose during our discussion of Robert's recent stroke. Robert's stroke rendered him certain limitations, but also has allowed him to explore how to write, how to exercise, indeed how to interface with life in general in new ways that allow him to continue to expand his sense of purpose. I'm certain that by the end of today's episode, you will have gleaned tremendous amounts of new knowledge that will allow you to navigate forward along the path to your purpose, perhaps find your purpose, if you feel you haven't done that yet, as well as to greatly enhance your relationship with yourself, with others, and indeed to the world around you. Before we begin, I'd like to emphasize that this podcast is separate from my teaching and research roles at Stanford. It is, however, part of my desired effort to bring zero cost to consumer information about science and science related tools to the general public. In keeping with that theme, I'd like to thank the sponsors of today's podcast. Our first sponsor is ROCA. ROCA makes eyeglasses and sunglasses that are the absolute highest quality. I've spent a lifetime working on the biology, the visual system, and I can tell you that your visual system has to contend with an enormous number of challenges in order for you to be able to see clearly. ROCA understands those challenges and has designed their eyeglasses and sunglasses accordingly, so that you always see with crystal clarity. ROCA eyeglasses and sunglasses are designed with a new technology called float fit, which allows them to fit perfectly and not move around even when you're active. In fact, whenever I'm wearing my ROCA eyeglasses or sunglasses, I usually forget that I'm wearing them. I happen to wear ROCA eyeglasses at night when I drive or if I'm reading at night, and I wear ROCA sunglasses during the daytime if it's very bright, especially if I'm driving into sunlight. If you'd like to try ROCA eyeglasses or sunglasses, you can go to roca.com. That's ROKA.com and enter the code Huberman for 20% off your first order. Again, that's ROKA.com and enter the code Huberman at checkout. Today's episode is also brought to us by Helix Sleep. Helix Sleep makes mattresses and pillows that are tailored to your unique sleep needs. Now sleep is the foundation of mental health, physical health, and performance. When we are sleeping well and enough, mental health, physical health, and performance all stand to be at their best. One of the key things to getting a great night's sleep is to make sure that your mattress is tailored to your unique sleep needs. Helix Sleep has a brief two-minute quiz that if you go to their website, you take that quiz and answer questions such as do you tend to sleep on your back, your side, your stomach. Do you tend to run hot or cold in the middle of the night? Maybe you don't know the answers to those questions and that's fine. At the end of that two-minute quiz, there will match you to a mattress that's ideal for your sleep needs. I sleep on the Dusk DUSK mattress and when I started sleeping on a dusk mattress about two years ago, my sleep immediately improved. If you're interested in upgrading your mattress, go to helixsleep.com.com. Take their two-minute sleep quiz and they'll match you to a customized mattress for you and you'll get up to $350 off any mattress order and two free pillows. Again, if interested, go to helixsleep.com.com. For up to $350 off and two free pillows. Today's episode is also brought to us by Waking Up. Waking Up is a meditation app that includes hundreds of meditation programs, mindfulness trainings, yoga knee-dra sessions, and NSDR, non-sleep-depressed protocols. I started using the Waking Up app a few years ago because even though I've been doing regular meditation since my teens and I started doing yoga knee-dra about a decade ago, my dad mentioned to me that he had found an app, turned out to be the Waking Up app, which could teach you meditations of different durations and that had a lot of different types of meditations to place the bringing body into different states and that he liked it very much. I gave the Waking Up app a try and I too found it to be extremely useful because sometimes I only have a few minutes to meditate, other times I have longer to meditate and indeed, I love the fact that I can explore different types of meditation to bring about different levels of understanding, about consciousness, but also to place my brain and body into lots of different kinds of states depending on which meditation I do. I also love that the Waking Up app has lots of different types of yoga knee-dra sessions. For those of you who don't know, yoga knee-dra is a process of lying very still, but keeping an active mind. It's very different than most meditations and there's excellent scientific data to show that yoga knee-dra and something similar to it, called non-sleep deep rest or NSDR, can greatly restore levels of cognitive and physical energy, even with just a short 10 minute session. If you'd like to try the Waking Up app, you can go to wakingup.com slash Huberman and access a free 30 day trial. Again,