Tel homme est ingrat, qui est moins coupable de son ingratitude que celui qui lui a fait du bien. - François de La Rochefoucauld

The defects of the mind are
like the wounds of the body. Whatever care we take to heal them the scars ever remain, and there is always danger of their reopening.

The greatest fault of a penetrating wit is to go beyond the mark.

Those who most obstinately oppose the most widely-held opinions more often do so because of pride than lack of intelligence. They find the best places in the right set already taken, and they do not want back seats.