What I am looking for is not out there, it is in me.

Once it was necessary that the people should multiply and be fruitful if the race was to survive. But now to preserve the race it is necessary that people hold back the power of propagation.

Knowledge is happiness, because to have knowledge - broad, deep knowledge - is to know true ends from false, and lofty things from low.

I don't give a damn about semi-radicals!

Love? Why ... it is what everybody feels for everybody else.

This world is so full of care and sorrow that it is a gracious debt we owe to one another to discover the bright crystals of delight hidden in somber circumstances and irksome tasks.

Many persons have a wrong idea of what constitutes true happiness. It is not attained through self-gratification but through fidelity to a worthy purpose.