People of uncommon abilities generally fall into eccentricities when their sphere of life is not adequate to their abilities.

The artist may be well advised to keep his work to himself till it is completed, because no one can readily help him or advise him with it... but the scientist is wiser not to withhold a single finding or a single conjecture from publicity.

The world is full of contradiction.

What is not fully understood is not possessed.

Whoever wishes to keep a secret must hide the fact that he possesses one.

All truly wise thoughts have been thought already thousands of times; but to make them truly ours, we must think them over again honestly, until they take root in our personal experience.

The people rate strength before everything.