I ran 48 miles. Got it done. For me, this was exceptionally difficult, mentally & physically. I recorded a clip after each session, saying something I'm grateful for. Thanks to David Goggins for the challenge, and to my stubborn brain for refusing to quit. The outline for the video is below, but first some relevant links: David Goggins challenge on Instagram: https://www.instagram.com/davidgoggins/ Relevant tweets from me: Start: https://twitter.com/lexfridman/status/1236132395721646085 12 miles: https://twitter.com/lexfridman/status/1236322462125690880 28 miles: https://twitter.com/lexfridman/status/1236563052788580352 40 miles: https://twitter.com/lexfridman/status/1236743863999627280 Outline: 0:00 - Introduction 1:51 - Session 1 - 4 miles - Childhood 4:33 - Session 2 - 8 miles - Family 6:57 - Session 3 - 12 miles - America 9:26 - Session 4 - 16 miles - Friendship 12:44 - Session 5 - Jiu Jitsu 18:11 - Session 6 - 20 miles - Books 23:36 - Session 7 - 24 miles - Artificial Intelligence 25:52 - Session 8 - 28 miles - MIT 29:02 - Session 9 - 32 miles - Community 32:39 - Session 10 - 36 miles - Podcast 39:58 - Session 11 - 40 miles - Hardship 43:30 - Session 12 - 48 miles - Life