Epictetus Quote

If what the philosophers say be true,—that all men's actions proceed from one source; that as they assent from a persuasion that a thing is so, and dissent from a persuasion that it is not, and suspend their judgment from a persuasion that it is uncertain,—so likewise they seek a thing from a persuasion that it is for their advantage.

Book I, ch. 18. - Discourses