You also must show the unlearned man the truth, and you will see that he will follow. But so long as you do not show it him, you should not mock, but rather feel your own incapacity.
For the man who has once stooped to consider such questions, and to reckon up the value of external things, is not far from forgetting what manner of man he is.
But if you suppose that only to be your own which is your own, and what belongs to others such as it really is, then no one will ever compel you or restrain you.
Be discriminating about what images and ideas you permit into your mind. If you yourself don't choose what thoughts and images you expose yourself to, someone else will, and their motives may not be the highest.
Appearances to the mind are of four kinds. Things either are what they appear to be; or they neither are, nor appear to be; or they are, and do not appear to be; or they are not, and yet appear to be. Rightly to aim in all these cases is the wise man's task.
Your happiness depends on three things, all of which are within your power: your will, your ideas concerning the events in which you are involved, and the use you make of your ideas.