“One is bound to one's wife, but has a bond to one's mistress.”
“Medicine is my lawful wife, and literature is my mistress. When I get fed up with one, I spend the night with the other”
“Love of learning is a pleasant and universal bond since it deals with what one is and not what one has.”
“I will have but one mistress and no master”
“If one's different, one's bound to be lonely.”
“But I'm married, and believe me, in getting to know thoroughly one's wife, if one loves her, as some one has said, one gets to know all women better than if one knew thousands of them.”