Dissent is the mark of freedom, as originality is the mark of independence of mind. … No one can be a scientist … if he does not have independence of observation and of thought.

To me the most interesting thing about man is that he is an animal who practices art and science and in every known society practices both together.

There are three creative ideas which, each in its turn, have been central to science. They are the idea of order, the idea of causes, and the idea of chance.

Science is the acceptance of what works and the rejection of what does not. That needs more courage than we might think.

It is a mistake to think of creative activity as something unusual

No science is immune to the infection of politics and the corruption of power.

The act of imagination is the opening of the system so that it shows new connections. Every act of act of imagination is the discovery of likenesses between two things which were thought unlike. An example is Newton’s thinking of the likeness between the thrown apple and moon sailing majestically in the sky. Hence, the ‘discovery’ of the laws of gravity.