We do not know, in most cases, how far social failure and success are due to heredity, and how far to environment. But environment is the easier of the two to improve. ↗
While I do not suggest that humanity will ever be able to dispense with its martyrs, I cannot avoid the suspicion that with a little more thought and a little less belief their number may be substantially reduced. ↗
Never bear more than one kind of trouble at a time. Some people bear three kinds of trouble - the ones they've had, the ones they have, and the ones they expect to have. ↗