"Logic will get you from A to B. Imagination will take you everywhere."

"The human organism is a highly ordered and organized system, which maintains its order by continually drawing order from its environment."

"The more deeply we penetrate into nature, the more we find that it is full of mysteries."

"The greatest change will be in the thinking habits of the human race. It will learn to look at things in a new way. Quantum theory will force it to do so."

"The greatest obstacle to progress in science is the belief that one knows something which one does not know."