To test whether you have learned an idea or a definition, rephrase what you just learned without using the new word.

When a Caltech student asked the eminent cosmologist Michael Turner what his "bias" was in favoring one or another particle as a likely candidate to compromise dark matter in the universe, Feynmann snapped, "Why do you want to know his bias? Form your own bias!"

The highest forms of understanding we can achieve are laughter and human compassion.

As you know, a theory in physics is not useful unless it is able to predict underlined effects which we would otherwise expect.

No man is rich who is unsatisfied, but who wants nothing possess his heart's desire.

The other thing that gives a scientific man the creeps in the world today are the methods of choosing leaders - in every nation. Today, for example, in the United States, the two political parties have decided to employ public relations men, that is, advertising men, who are trained in the necessary methods of telling the truth or lying in order to develop a product.

Tell your son to stop trying to fill your head with science - for to fill your heart with love is enough!