"When the solution is simple, God is answering."

"Few are those who see with their own eyes and feel with their own hearts."

"Things should be made as simple as possible, but not any simpler."

"Put your hand on a hot stove for a minute, and it seems like an hour.
Sit with a pretty girl for an hour, and it seems like a minute."

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."

"Problems cannot be solved at the same level of awareness that created them."

"God does not play dice with the universe."

"Common sense is the collection of prejudices acquired by age 18."

"I do not know with what weapons World War 3 will be fought, but World War 4 will be fought with sticks and stones."

"Great spirits have always encountered violent opposition from mediocre minds."

"The highest principles for our aspirations and judgements are given to us in the Jewish-Christian religious tradition."

"Knowledge of what is does not open the door directly to what should be."

"We all try to escape pain and death, while we seek what is pleasant."

• "I am enough of an artist to draw freely upon my imagination.
• Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world."

• "One should guard against inculcating a young man {or woman} with the idea that success is the aim of life, for a successful man normally receives from his peers an incomparably greater portion than the services he has been able to render them deserve.
• The value of a man resides in what he gives and not in what he is capable of receiving."

• "To know that what is impenetrable for us really exists and manifests itself as the highest wisdom and the most radiant beauty, whose gross forms alone are intelligible to our poor faculties - this knowledge, this feeling ... that is the core of the true religious sentiment.
• In this sense, and in this sense alone, I rank myself among profoundly religious men."