I abhor the supreme folly of those who blame the disciples of nature in defiance of those masters who were themselves her pupils

Fire destroys falsehood, that is sophistry, and restores truth, driving out darkness.

People reveal themselves completely only when they are thrown out of the customary conditions of their life.

All our knowledge hast its origins in our perceptions … In nature there is no effect without a cause … Experience never errs; it is only your judgments that err by promising themselves effects such as are not caused by your experiments … Science is the observation of things possible, whether present or past; prescience is the knowledge of things which may come to pass.

Experience never misleads; what you are misled by is only your judgment, and this misleads you by anticipating results from experience of a kind that is not produced by your experiments.

The sun gives spirit and life to the plants and the earth nourishes them with moisture.

Therefore, O students, study mathematics and do not build without foundations.