Men are born for the sake of each other. So either teach or tolerate.

[Οἱ ἄνθρωποι γεγόνασιν ἀλλήλων ἕνεκεν: ἢ δίδασκε οὖν ἢ φέρε.]

Marcus Aurelius (AD 121-180) Roman emperor (161-180), Stoic philosopher

Meditations [To Himself; Τὰ εἰς ἑαυτόν], Book 8, ch. 59 (8.59) (AD 161-180) [tr. Hammond (2006)]
    (Source)

(Source (Greek)). Alternate translations:

All men are made one for another: either then teach them better, or bear with them.
[tr. Casaubon (1634), 8.56]

Men are born to be serviceable to one another, therefore either Reform the World, or bear with it.
[tr. Collier (1701); Collier/Zimmern (1887)]

Men were formed for each other. Teach them better, then, or bear with them.
[tr. Hutcheson/Moor (1742)]

Men were born for the service and benefit of each other. Eitehr teach them this obvious truth, or bear with their ignorance.
[tr. Graves (1792), 8.57]

Men exist for the sake of one another. Teach them then, or bear with them.
[tr. Long (1862)]

Men exist for one another. Teach them then, or bear with them.
[tr. Rendall (1898)]

Men were created the one for the other. Teach them better then, or bear with them.
[tr. Hutcheson/Chrystal (1902)]

Mankind have been created for the sake of one another. Either instruct therefore or endure.
[tr. Haines (Loeb) (1916)]

Men have come into the world for the sake of one another. Either instruct them then or bear with them.
[tr. Farquharson (1944)]

Men exist for each other. Then either improve them, or put up with them.
[tr. Staniforth (1964)]

Human beings are here for the sake of one another; either instruct them, then, or put up with them.
[tr. Hard (1997 ed.)]

People exist for one another. You can instruct or endure them.
[tr. Hays (2003)]

[Human beings have come into the world for the sake of one another; either instruct them, then, or put up with them.
[tr. Hard (2011 ed.)]

Men were created for one another; either teach them, or endure them.
[ed. Taplin (2016)]