Science is always simple and always profound. It is only the half-truths that are dangerous.

The grand aim of all science is to cover the greatest number of empirical facts by logical deduction from the smallest number of hypotheses or axioms.

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

The man of science is a poor philosopher.

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

It stands to the everlasting credit of science that by acting on the human mind it has overcome man's insecurity before himself and before nature.