To know a species, look at its fears. To know yourself, look at your fears. Fear in itself is not important, but fear stands there and points you in the direction of things that are important. Don't be afraid of your fears, they're not there to scare you; they're there to let you know that something is worth it.
Our long wanderings have made a man out of him, too. They have not only strengthened his frame and hardened his constitution, but they have given stability to his character. He is thoughtful and prudent, and his advice will always be valuable, while of his courage I have no doubt.
Free your mind of that which you have no control. It is not only good to do so for your mental, but your overall health. Some people must learn from experience. You can convey knowledge to them and offer to show them the way. But, that doesn't mean your wisdom will be accepted or appreciated.