Nothing that happens injures me, unless I take it as an evil; and it is in my power not to take it so.
Marcus Aurelius' Meditations, book v, sec. 20
The mind turns every obstacle into an aid.
Marcus Aurelius' Meditations, book vii, sec. 14
Man becomes better and nobler by making a right use of all that comes to pass.
Marcus Aurelius' Meditations, book x, sec. 33