The Enchiridion (3-5)

With regard to whatever objects either delight the mind, or contribute to use, or are tenderly beloved, remind yourself of what nature they are, beginning with the merest trifles: if you have a favorite cup, that it is but a cup of which you are fond,—for thus, if it is broken, you can bear it; if you embrace your child, or your wife, that you embrace a mortal,—and thus, if either of them dies, you can bear it.

When you set about any action, remind yourself of what nature the action is. If you are going to bathe, represent to yourself the incidents usual in the bath,—some persons pouring out, others pushing in, others scolding, others pilfering. And thus you will more safely go about this action, if you say to yourself, I will now go to bathe, and keep my own will

Men are disturbed not by things, but by the views which they take of things. Thus death is nothing terrible, else it would have appeared so to Socrates. But the terror consists in our notion of death, that it is terrible. When, therefore, we are hindered, or disturbed, or grieved, let us never impute it to others, but to ourselves; that is, to our own views. It is the action of an uninstructed person to reproach others for his own misfortunes; of one entering upon instruction, to reproach himself; and of one perfectly instructed, to reproach neither others nor himself.