Pessimism leads to weakness, optimism to power....

It is well for the world that in most of us, by the age of thirty, the character has set like plaster, and will never soften again.

The art of being wise is the art of knowing what to overlook.

It is our attitude at the beginning of a difficult task which, more than anything else, will affect its successful outcome.

Admiration of the proletariat, like that of dams, power stations, and aeroplanes, is part of the ideology of the machine age.

Those who improve with age embrace the power of personal growth and personal achievement and begin to replace youth with wisdom, innocence with understanding, and lack of purpose with self-actualization.

There are few things that we so unwillingly give up, even in advanced age, as the supposition that we still have the power of ingratiating ourselves with the fair sex.

If repression has indeed been the fundamental link between power, knowledge, and sexuality since the classical age, it stands to reason that we will not be able to free ourselves from it except at a considerable cost.