If I went back to my 20-year-old self, what I would tell my 20-year-old self is, 'You don't know anything.' Because everyone, when they're young, they think they know what's going on in the world, and you don't.

The moment the alarm goes off is the first test; it sets the tone for the rest of the day. The test is not a complex one: when the alarm goes off, do you get up out of bed, or do you lie there in comfort and fall back to sleep? If you have the discipline to get out of bed, you win - you pass the test.

Discipline starts every day when the first alarm clock goes off in the morning. I say 'first alarm clock' because I have three, as I was taught by one of the most feared and respected instructors in SEAL training: one electric, one battery powered, one windup.

Jocko Willink Quotes