If you wish to be free, do not desire anything that depends on another, lest you make them your master. - Epictetus

Nothing important comes into being overnight; even grapes and figs need time to ripen. If you say that you want a fig now, I will tell you to be patient. First, you must allow the tree to flower, then put forth fruit; then you have to wait until the fruit is ripe. So if the fruit of a fig tree is not brought to maturity instantly or in an hour, how do you expect the human mind to come to fruition, so quickly and easily?

Който не умее да владее себе си, той е роб, па ако ще да е владетел на целия свят. Епиктет

Now there are two kinds of hardening, one of the understanding, the other of the sense of shame, when a man is resolved not to assent to what is manifest nor to desist from contradictions. Most of us are afraid of mortification of the body, and would contrive all means to avoid such a thing, but we care not about the soul's mortification. And indeed with regard to the soul, if a man be in such a state as not to apprehend anything, or understand at all, we think that he is in a bad condition; but if the sense of shame and modesty are deadened, this we call even power (or strength).