Let whatever appears to be the best be to you an inviolable law. And if any instance of pain or pleasure, glory or disgrace, be set before you, remem… - Epictetus

26. The will of nature may be learned from those things in which we don’t distinguish from each other. For example, when our neighbor’s boy breaks a cup, or the like, we are presently ready to say, “These things will happen.” Be assured, then, that when your own cup likewise is broken, you ought to be affected just as when another’s cup was broken. Apply this in like manner to greater things. Is the child or wife of another dead? There is no one who would not say, “This is a human accident.” but if anyone’s own child happens to die, it is presently, “Alas I how wretched am I!” But it should be remembered how we are affected in hearing the same thing concerning others.

Who's my 'master? Whoever controls what you desire or dislike.

Well, when do we act like sheep: when we act for the sake of the belly, or of our sex-organs, or at random, or in a filthy fashion, or without due consideration, to what level have we degenerated?

To the level of sheep.