You don’t have to love every part of your path. You just have to know why you’re on it.

Endurance comes from reasons, not enjoyment. Nearly every worthwhile route includes sections that are dull or hard, and the people who keep going are not the ones who found them fun. They are the ones who can say, in a sentence, what the whole thing is for. Without that sentence, every unpleasant part becomes an argument for quitting.

Write your reason down in plain words, no bigger than it really is. Then keep it somewhere you will see it on a bad morning. If you cannot write it at all, that is worth knowing.