Ego is the immediate dictate of human consciousness.

A new scientific truth is usually not propagated in such a way that opponents become convinced and discard their previous views. No, the adversaries eventually die off, and the upcoming generation is familiarised anew with the truth.

A new truth always has to conend with many difficulties. If it were not so, it would have been discovered much sooner.

Science progresses not by convincing the adherents of old theories that they are wrong, but by allowing enough time to pass so that a new generation can arise unencumbered by the old errors.

A scientist is happy, not in resting on his attainments but in the steady acquisition of fresh knowledge.

There is a real world independent of our senses; the laws of nature were not invented by man, but forced on him by the natural world. They are the expression of a natural world order.

Science advances one funeral at a time.