It cannot be maintained that empirical science provides a complete explanation of life, the interplay of all creatures and the whole of reality.

The most beautiful experience we can have is the mysterious. It is the source of all true art and science.

The man of science is a poor philosopher.

Science is a wonderful thing if one does not have to earn one's living at it.

But science can only be created by those who are thoroughly imbued with the aspiration toward truth and understanding

To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.