The philosopher is distinguished from the ignorant man by putting blame on the right person.
The first difference between the philosopher and the uneducated man is that the latter says, 'Woe is me for me child, for my brother, woe is me for my father', and the other, if he is compelled to speak, considers the matter and says, 'Woe is me for myself.' For nothing outside the will can hinder or harm the will; it can only harm itself. If then we accept this, and, when things go amiss, are inclined to blame ourselves, remembering that judgement alone can disturb our peace and constancy, I swear to you by all the gods that we have made progress. (vol. 2, bk. 3, ch. 19, p. 53)
Epictetus. The Discourses and Manual. Trans. P.E. Matheson. Oxford University Press 1916.
Works and Days