Epictetus: 

From now on practice saying to everything that appears unpleasant: “You are just an appearance and by no means what you appear to be.” And then thoroughly consider the matter according to the principles just discussed, primarily: does this appearance concern the things that are within my own control or those that are not? If it concerns anything outside your control, train yourself not to worry about it.

從現在開始練習對任何看來令人不愉快的事情說：「你無論如何都只是一個表象，實質上未必如此。」然後依據之前討論過的原則加以徹底思考，首先：這事情是不是在我的控制範圍之內？如果它是你無法控制的，訓練自己不要去為它煩惱。