Experience is the best teacher, and the worst experiences teach the best lessons. - Jordan Peterson

It is better, proverbially, to rule your own spirit than to rule a city.

What is your friend: the things you know, or the things you don't know. First of all, there's a lot more things you don't know. And second, the things you don't know is the birthplace of all your new knowledge! So if you make the things you don't know your friend, rather than the things you know, well then you're always on a quest in a sense. You're always looking for new information in the off chance that somebody who doesn't agree with you will tell you something you couldn't have figured out on your own! It's a completely different way of looking at the world. It's the antithesis of opinionated.

You already know what you know, after all — and, unless your life is perfect, what you know is not enough. You remain threatened by disease, and self-deception, and unhappiness, and malevolence, and betrayal, and corruption, and pain, and limitation. You are subject to all these things, in the final analysis, because you are just too ignorant to protect yourself. If you just knew enough, you could be healthier and more honest. You would suffer less. You could recognize, resist and even triumph over malevolence and evil. You would neither betray a friend, nor deal falsely and deceitfully in business, politics or love. However, your current knowledge has neither made you perfect nor kept you safe. So, it is insufficient, by definition — radically, fatally insufficient.