Marcus Aurelius
Meditations 7.44
From Plato: But I would make this man a sufficient answer, which is this: Thou sayest not well, if thou thinkest that a man who is good for anything at all ought to compute the hazard of life or death, and should not rather look to this only in all that he does, whether he is doing what is just or unjust, and the works of a good or bad man.
Marcus Aurelius, Meditations 7.44, translated by George Long
[Citations from Plato]:
I might fairly answer such a questioner: Thou art mistaken if thou thinkest that a man, who is worth anything at all, ought to let considerations of life and death weigh with him rather than in all that he does consider but this, whether it is just or unjust and the work of a good man or a bad.
Marcus Aurelius, Meditations 7.44, translated by C. R. Haines