It has often been said, and certainly not without justification, that the man of science is a poor philosopher.

If you do the same thing over and over again you cannot ever expect a different outcome.

It is an outcome of faith that nature-as she is perceptible to our five senses-takes the character of such a well formulated puzzle.

We should take care not to make the intellect our god; it has, of course, powerful muscles, but no personality.

Don't second guess the mistakes you've made, others will do that for you. Make things as simple as possible, but not simpler.

Beyond the realms of what we see, into the regions or the unexplored limited only by our imaginations.

Human knowledge and skills alone cannot lead humanity to a happy and dignified life. Humanity has every reason to place the proclaimers of high moral standards and values above the discoverers of objective truth.