Tell yourself, when you feel exasperated and out of all patience, that this mortal life endures but a moment; it will not be long before we shall one and all have been laid to rest.

[ὅταν λίαν ἀγανακτῇς ἢ καὶ δυσπαθῇς, ἀκαριαῖος ὁ ἀνθρώπειος βίος καὶ μετ᾿ ὀλίγον πάντες ἐξετάθημεν.]

Marcus Aurelius (AD 121-180) Roman emperor (161-180), Stoic philosopher
Meditations [To Himself; Τὰ εἰς ἑαυτόν], Book 11, ch. 18 (11.18) (AD 161-180) [tr. Staniforth (1964)]
    (Source)

Marcus' 6th point to remember when aggravated by another's actions.

(Source (Greek)). Alternate translations:

That whensoever thou doest take on grievously, or makest great woe, little doest thou remember then that a man's life is but for a moment of time, and that within a while we shall all be in our graves.
[tr. Casaubon (1634)]

When you are most Angry and Gall'd, remember that Humane Life lasts but a Moment, and that we shall all of us very quickly , be laid in our Graves.
[tr. Collier (1701)]

When your anger and resentment is highest, remember human life is but for a moment. We shall be all presently stretched out dead corpses.
[tr. Hutcheson/Moor (1742)]

When you are excessively provoked and suffer some real injury, reflect that human life is but of a moment's duration, and that in a short time we shall all be laid in our tombes together.
[tr. Graves (1792)]

Consider when thou art much vexed or grieved, that man's life is only a moment, and after a short time we are all laid out dead.
[tr. Long (1862)]

When you are most angry and vexed remember that human life lasts but a moment, and that we shall all of us very quickly be laid in our graves.
[tr. Collier/Zimmern (1887)]

When sorely provoked and out of patience, remember that man's life is but for a moment; a little while, and we all lie stretched in death.
[tr. Rendall (1898)]

When you are vexed or worried overmuch, remember that man’s life is but for a moment, and that in a little we shall all be laid to rest.
[tr. Hutcheson/Chrystal (1902)]

When thou art above measure angry or even out of patience, bethink thee that man's life is momentary, and in a little while we shall all have been laid out.
[tr. Haines (Loeb) (1916)]

When you are highly indignant or actually suffering, that man's life is but a moment, and in a little we are one and all laid low in death.
[tr. Farquharson (1944)]

When you are annoyed beyond measure and losing all patience, remember that human life lasts but a moment, and that in a short while we shall all have been laid to rest.
[tr. Hard (1997 ed. and 2011 ed.)]

When you lose your temper, or even feel irritated: that human life is very short. Before long all of us will be laid out side by side.
[tr. Hays (2003)]

When you are high in indignation and perhaps losing patience, remember that human life is a mere fragment of time and shortly we are all in our grave.
[tr. Hammond (2006)]

Whenever you are excessively disturbed or even suffering, remember that human life lasts only a moment and that in a short time we will all be laid out for burial.
[tr. Needleman/Piazza (2008)]

Whenever you are really angry and upset, [remember] that human life is short and soon we will all be in the ground.
[tr. @sentantiq (2020)]