"A man who has not passed through the inferno of his passions has never overcome them."

"The less an adult is able to understand his own hidden motives, the more he is at the mercy of them."

"The brighter the light, the darker the shadow."

"The beginning of wisdom is the admission of one's own lack of knowledge. The more you know, the more you realize you don't know."

"The shoe that fits one person pinches another; there is no recipe for living that suits all cases."