Mathematicians do not write for the circulating library.

In all sincere speech there is power, not necessarily great power, but as much as the speaker is capable of.

Science is the systematic classification of experience.

Sincerity is moral truth.

Many a genius has been slow of growth. Oaks that flourish for a thousand years do not spring up into beauty like a reed.

Books have become our dearest companions, yielding exquisite delights and inspiring lofty aims.

Speak for yourself and from yourself, or be silent.