The greater the scientist, the more he is impressed with his ignorance of reality, and the more he realizes that his laws and labels, descriptions and definitions, are the products of his own thought. They help him to use the world for purposes of his own devising rather than understand and explain it.
One of the biggest lessons I've learned recently is that when you don't know what to do, you should do nothing until you figure out what to do because a lot of times you feel like you are pressed against the wall, and you've got to make a decision. You never have to do anything. Don't know what to do? Do nothing.
I once heard a learned man say, "Every evil has its remedy, except folly. To reprimand an obstinate fool or to preach to a dolt is like writing upon the water. Christ healed the blind, the halt, the palsied, and the leprous. But the fool He could not cure."
Real wisdom is not the knowledge of everything, but the knowledge of which things in life are necessary, which are less necessary, and which are completely unnecessary to know.
I praise God for you, sir: your reasons at dinner have been sharp and sententious; pleasant without scurrility, witty without affectation, audacious without impudency, learned without opinion, and strange with-out heresy.