Discipline Equals Freedom summary

Discipline not only arms you against laziness, but it fuels you to succeed. It gives you purpose and clarity. You know why you’re choosing to wake up at 6:30 a.m. instead of hitting that tempting snooze button. That commitment to meet your goal every day should take the shape of aggression. 

Of course, that doesn’t mean you should be openly hostile for no reason or confrontational all the time. Aggression is the fire that ignites you to go after what you want. It’s a fighting attitude to use everything you have to outmaneuver and outperform your opponent. When you’re aggressive, you’re proactive – you don’t wait for your enemies to attack first. 

You only have one life to live – and one shot at making it matter. This comes with a lot of stress, but adopting a few good habits will keep you moving toward the best version of yourself. 

You need to eliminate anything that stalls your progress, like dwelling on mistakes. They’re bound to happen. Everyone makes them. And though it’s easy to dwell on those mistakes, the past can’t be changed. Regret just stops progress. The only productive purpose for regret is to teach a lesson on what to do differently next time. That’s it. So let regret fuel you to learn from the past, but not live in it. 

Now that we’ve covered what it means to have discipline, let’s put it into action. There are two crucial everyday habits that everyone should start ASAP: a rigorous exercise routine and good sleeping habits. 

First off, if you’re not exercising regularly, you should be. Exercise pumps up your natural endorphins and testosterone levels while giving your immune system a boost. Additionally, it makes you smarter by improving blood flow to the brain and releasing chemicals that help you think. 

Regular exercise is 100 percent essential to becoming the best version of yourself. But what’s the very best workout? Anything! All exercise is equally valuable. 

What matters is that you’re doing something, whether that’s stretching, walking, lifting weights, swimming, or playing a game of basketball. Exercise doesn't need to be complicated or proven by some science-driven methodology. You just need to move your body. 

You never know when you might find yourself in danger. It happens even though nobody likes to think it will. But just being strong isn’t enough protection in threatening situations. That’s why Jocko recommends training in the ancient self-defense practice of martial arts. 

The fundamental principles of martial arts have never changed and never will, but they evolve with new techniques and moves all the time. Martial arts can be explained in three broad categories: grappling, which uses leverage and holds to dominate your opponent; striking, which uses any body part – like punches, kicks, and headbutts – to defeat your enemy; and martial arts with weapons, which involve, well, weapons. Think sticks, knives, and firearms. 

Food is fuel for your body. If you want to become stronger and faster, you need to give your body the right fuel. But many of us rely on empty calories like doughnuts and cookies to get us through the day. You might think of them as food, but they’re not. They’re simply sugar delivery systems. 

So, what should you be eating for optimal fuel? Let’s look to our human past to understand how to eat in the present. Our prehistoric ancestors thrived on a diet of vegetables and meat, with limited fruit.