"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."

"I feel I shall find the truth on my deathbed and be surrounded by people too stupid to understand—fussing about medicines instead of searching for wisdom."

"It is undesirable to believe a proposition when there is no ground whatever for supposing it true."

"It is a waste of energy to be angry with a man who behaves badly, just as it is to be angry with a car that won't go."

"In many women, especially rich Society women, the capacity for feeling love is completely dried up, and is replaced by a powerful desire that all men should love them."