We must give up many things to which we are addicted

From The Daily Stoic by Ryan Holiday and Stephen Hanselman. 

We must give up many things to which we are addicted, considering them to be good. Otherwise, courage will vanish, which should continually test itself. Greatness of soul will be lost, which can’t stand out unless it disdains as petty what the mob regards as most desirable.

—SENECA, MORAL LETTERS, 74.12b–13