Investigate what is, and not what pleases.

Nothing should be valued higher than the value of the day.

The credit of advancing science has always been due to individuals and never to the age.

When translating one must proceed up to the intranslatable; only then one becomes aware of the foreign nation and the foreign tongue.

Superstition is the poetry of life.

The real scholar learns how to evolve the unknown from the known, and draws near the master.

Let him who believes in immortality enjoy his happiness in silence; he has no reason to give himself airs about it.