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

An experiment is a question which science poses to Nature and a measurement is the recording of Nature's answer.

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

A scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die and a new generation grows up that is familiar with it.

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.

Ego is the immediate dictate of human consciousness.

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