Vengeance is mine, and I will repay

Some mathematician has said pleasure lies not in discovering truth, but in seeking it

The essence of all slavery consists in taking the product of anther's labor by force. It is immaterial whether this force be founded upon ownership of the slave or ownership of the money that he must get to live

True science investigates and brings to human perception such truths and such knowledge as the people of a given time and society consider most important. Art transmits these truths from the region of perception

The question was a fashionable one, whether a definite line exists between psychological and physiological phenomena in human activity; and if so, where it lies?

It is easier to produce ten volumes of philosophical writing than to put one principle into practice

The means to gain happiness is to throw out from oneself like a spider in all directions an adhesive web of love, and to catch in it all that comes

Before we can study the central issues of life today, we must destroy the prejudices and fallacies born of previous centuries

What counts in making a happy marriage is not so much how compatible you are, but how you deal with incompatibility

In saying that without the power of the state, evil men would rule over the good. It is taken for granted that the good are precisely those who at the present time have power, and the bad the same who are no subjugated