The Enchiridion of Epictetus

Straightway then practice saying to every harsh appearance,1 You are an appearance, and in no manner what you appear to be. Then examine it by the rules which you possess, and by this first and chiefly, whether it relates to the things which are in our power or to the things which are not in our power: and if it relates to anything which is not in our power, be ready to say, that it does not concern you.

If a man has reported to you, that a certain person speaks ill of you, do not make any defense (answer) to what has been told you: but reply, The man did not know the rest of my faults, for he would not have mentioned these only.

When any person treats you ill or speaks ill of you, remember that he does this or says this because he thinks that it is his duty. It is not possible then for him to follow that which seems right to you, but that which seems right to himself. Accordingly if he is wrong in his opinion, he is the person who is hurt, for he is the person who has been deceived; for if a man shall suppose the true conjunction to be false, it is not the conjunction which is hindered, but the man who has been deceived about it. If you proceed then from these opinions, you will be mild in temper to him who reviles you: for say on each occasion, It seemed so to him.

These reasonings do not cohere: I am richer than you, therefore I am better than you; I am more eloquent than you, therefore I am better than you. On the contrary these rather cohere, I am richer than you, therefore my possessions are greater than yours: I am more eloquent than you, therefore my speech is superior to yours. But you are neither possession nor speech.

Envy is the antagonist of the fortunate