What is deservedly suffered must be borne with calmness, but when the pain is unmerited, the grief is resistless.Ovid
There is no person so severely punished, as those who subject themselves to the whip of their own remorse.Lucius Annaeus Seneca
One declaims endlessly against the passions; one imputes all of man's suffering to them. One forgets that they are also the source of all his pleasures.Denis Diderot