"People reveal themselves completely only when they..." - Quote by Leonardo Da Vinci

“Those who are enamoured of practice without science are like a pilot who goes into a ship without rudder or compass and never has any certainty of where he is going. Practice should always be based upon a sound knowledge of theory.”

“Ask advice of him who governs himself well.”

“Whoever despises the high wisdom of mathematics nourishes himself on delusion and will never still the sophistic sciences whose only product is an eternal uproar.”

“But we love the Old Travelers. We love to hear them prate and drivel and lie.”

“Solitude is impractical and yet society is fatal.”

“The fatal errors of life are not due to man's being unreasonable: an unreasonable moment may be one's finest moment. They are due to man's being logical.”

“There are two big forces at work, external and internal. We have very little control over external forces such as tornadoes, earthquakes, floods, disasters, illness and pain. What really matters is the internal force. How do I respond to those disasters? Over that I have complete control.”

“I treasure the memory of the past misfortunes. It has added more to my bank of fortitude.”

“Napoleon Hill saw this law of transmutation as the seed of equivalent benefit: With every disappointment, heartbreak, or failure, there exists an equal (usually greater) positive benefit.”