...The entire preoccupation of the physicist is with things that contain within themselves a principle of movement and rest.

It is simplicity that makes the uneducated more effective than the educated when addressing popular audiences.

Intuition is the source of scientific knowledge.

When...we, as individuals, obey laws that direct us to behave for the welfare of the community as a whole, we are indirectly helping to promote the pursuit of happiness by our fellow human beings.

Youth should stay away from all evil, especially things that produce wickedness and ill-will.

Neither should we forget the mean, which at the present day is lost sight of in perverted forms of government; for many practices which appear to be democratical are the ruin of democracies, . . Those who think that all virtue is to be found in their own party principles push matters to extremes; they do not consider that disproportion destroys a state.

All communication must lead to change