Time, whose tooth gnaws away everything else, is powerless against truth.

Science has fulfilled her function when she has ascertained and enunciated truth.

The more rapidly truth is spread among mankind the better it will be for them. Only let us be sure that it is the truth.

Ecclesiasticism in science is only unfaithfulness to truth.

The only medicine for suffering, crime, and all other woes of mankind, is wisdom. Teach a man to read and write, and you have put into his hands the great keys of the wisdom box. But it is quite another thing to open the box.

In science, as in art, and, as I believe, in every other sphere of human activity, there may be wisdom in a multitude of counsellors, but it is only in one or two of them.

In scientific work, those who refuse to go beyond fact rarely get as far as fact.

If a man cannot do brain work without stimulants of any kind, he had better turn to hand work it is an indication on Nature's part that she did not mean him to be a head worker.