Falling down is not a failure. Failure comes when you stay where you have fallen.
To Believe without evidence and demonstration is an act of ignorance and folly
Only the knowledge that comes from inside is the real Knowledge
I was afraid that by observing objects with my eyes and trying to comprehend them with each of my other senses I might blind my soul altogether.
Often when looking at a mass of things for sale, he would say to himself, 'How many things I have no need of!'
If thou continuous to take delight in idle argumentation thou mayest be qualified to combat with the sophists, but will never know how to live with men.