The importance of an individual thinker owes something to chance. For it depends upon the fate of his ideas in the minds of his successors.

Nature is probably quite indifferent to the aesthetic preferences of mathematicians.

The aim of science is to seek the simplest explanation of complex facts. We are apt to fall into the error of thinking that the facts are simple because simplicity is the goal of our quest. The guiding motto in the life of every natural philosopher should be ``Seek simplicity and distrust it.''

How the past perishes is how the future becomes.

The motive of success is not enough.

Everyone is a philosopher. Not everyone is good at it.

What is morality in any given time or place? It is what the majority then and there happen to like and immorality is what they dislike.