Whatever moral rules you have deliberately proposed to yourself, abide by them as they were laws, and as if you would be guilty of impiety by violating any of them. Don’t regard what anyone says of you, for this, after all, is no concern of yours. How long, then, will you put off thinking yourself worthy of the highest improvements and follow the distinctions of reason? You have received the philosophical theorems, with which you ought to be familiar, and you have been familiar with them. What other master, then, do you wait for, to throw upon that the delay of reforming yourself?

Epictetus in The Enchiridion. Cf. Mike Tyson.

The Enchiridion by Epictetus – The Internet Classics Archive

Probably going to go on a Stoicism bender pretty soon.

There is great danger in immediately throwing out what you have not digested. And, if anyone tells you that you know nothing, and you are not nettled at it, then you may be sure that you have begun your business. For sheep don’t throw up the grass to show the shepherds how much they have eaten; but, inwardly digesting their food, they outwardly produce wool and milk. Thus, therefore, do you likewise not show theorems to the unlearned, but the actions produced by them after they have been digested.

The Enchiridion by Epictetus – The Internet Classics Archive

Envy works upon what is close at hand, and things that are far off we are more free to admire.

Life will follow the path it started upon, and will neither reverse nor check its course; it will make no noise, it will not remind you of its swiftness. Silent it will glide on; it will not prolong itself at the command of a king, or at the applause of the populace. Just as it was started on its first day, so it will run; nowhere will it turn aside, nowhere will it delay.

He who bestows all of his time on his own needs, who plans out every day as if it were his last, neither longs for nor fears the morrow. For what new pleasure is there that any hour can now bring? They are all known, all have been enjoyed to the full.

Seneca is my new jam.

Heaven knows! such lives as yours, though they should pass the limit of a thousand years, will shrink into the merest span; your vices will swallow up any amount of time.

Look back in memory and consider when you ever had a fixed plan, how few days have passed as you had intended, when you were ever at your own disposal, when your face ever wore its natural expression, when your mind was ever unperturbed, what work you have achieved in so long a life, how many have robbed you of life when you were not aware of what you were losing, how much was taken up in useless sorrow, in foolish joy, in greedy desire, in the allurements of society, how little of yourself was left to you; you will perceive that you are dying before your season!

Seneca. I’ll probably have a few more from this one soon…