Religion is something left over from the infancy of our intelligence, it will fade away as we adopt reason and science as our guidelines.
The fundamental concept in social science is Power, in the same sense in which Energy is the fundamental concept in physics.
Three passions, simple but overwhelmingly strong, have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind.
The good life is one inspired by love and guided by knowledge.
There is much pleasure to be gained from useless knowledge.
Science is what you know, philosophy is what you don't know.
Dogmatism and skepticism are both, in a sense, absolute philosophies; one is certain of knowing, the other of not knowing. What philosophy should dissipate is certainty, whether of knowledge or ignorance.
The degree of one's emotions varies inversely with one's knowledge of the facts.
Almost everything that distinguishes the modern world from earlier centuries is attributable to science, which achieved its most spectacular triumphs in the seventeenth century.