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 advances one funeral at a time.

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.

Experiment is the only means of knowledge at our disposal. Everything else is poetry, imagination.

No burden is so heavy for a man to bear as a succession of happy days.

We have no right to assume that any physical laws exist, or if they have existed up until now, that they will continue to exist in a similar manner in the future.