Smile it is the key that fits the lock of everybody's heart.

If by chance some day you're not feeling well and you should remember some silly thing I've said or done and it brings back a smile to your face or a chuckle to your heart then my purpose as your clown has been fulfilled.

I have witnessed the softening of the hardest of hearts by a simple smile.

I want to touch the heart of the world and make it smile.

A kind heart is a fountain of gladness making everything in its vicinity freshen into smiles.

Science is not a heartless pursuit of objective information. It is a creative human activity its geniuses acting more as artists than as information processors.

The science of life is changing hearts and minds.

While most of us know that we feel better after a good hearty laugh science in many cases is yet to prove why.

Evolution seems to close the heart to some of the plainest spiritual truths while it opens the mind to the wildest guesses advanced in the name of science.

The radical novelty of modern science lies precisely in the rejection of the belief... that the forces which move the stars and atoms are contingent upon the preferences of the human heart.