"Desire for security keeps littleness little and threatens the great with smallness."

"He who is always his own counselor will often have a fool for his client."

"Inventions reached their limit long ago, and I see no hope for further development."

"If at first you don't succeed, why go on and make a fool of yourself?"

"Even at our birth, death does but stand aside a little. And every day he looks towards us and muses somewhat to himself whether that day or the next he will draw nigh."

"We learn the rope of life by untying its knots."

"Faith is not the knowledge of what the mystery of the universe is, but the conviction that there is a mystery, and that it is greater than us."

"God gives, but man must open his hand."

"You go back. You search for what made you happy when you were smaller. We are all grown up children, really... So one should go back and search for what was loved and found to be real."

"As for everything else, so for mathematical theory: beauty can be perceived but not explained."

"Better to light a candle than to curse the darkness."

"As it is more blessed to give than receive, so it must be more blessed to receive than to give back."