Do your best & let it be. Marcus Aurelius 6.2

Do the task before you. Don't worry about the past, in which you were born, or the future, in which you will die. The present moment is enough for you. “Sufficient unto the day is the evil thereof,” as another wise ancient once said.

Μὴ διαφέρου πότερον ῥιγῶν ἢ θαλπόμενος τὸ πρέπον ποιεῖς, καὶ πότερον νυστάζων ἢ ἱκανῶς ὕπνου ἔχων, καὶ πότερον κακῶς ἀκούων ἢ εὐφημούμενος, καὶ πότερον ἀποθνῄσκων ἢ πράττων τι ἀλλοῖον· μία γὰρ τῶν βιωτικῶν πράξεων καὶ αὕτη ἐστί, καθ’ ἣν ἀποθνῄσκομεν· ἀρκεῖ οὖν καὶ ἐπὶ ταύτης τὸ παρὸν εὖ θέσθαι.

Don't hesitate all the time, wondering whether you're doing the right thing. Asking yourself if you're too hot or too cold, if you should sleep or get up already, if you're being insulted or flattered, if you're dying or doing some other grave thing. There is really just one way of doing business common to all living beings, and we die at the end of it. It is enough in this way, on this path, if you simply do the task before you as best you can.