There is no rule of life contained in the precept that a man should pursue his own happiness.
 Marcus Aurelius, Meditations (c. 170 - 180). copy citation

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Author Marcus Aurelius
Source Meditations
Topic happiness life
Date c. 170 - 180
Language English
Reference
Note Translated by George Long
Weblink https://www.gutenberg.org/files/15877/15877-h/15877-h.htm

Context

“The ways of going out indeed are many, and that is a good reason for a man taking care of himself. [A] [A] See Plinius H.N. ii., c. 7; Seneca, De Provid. c. 6; and Ep. 70: "Nihil melius aeterna lex," &c. Happiness was not the direct object of a Stoic's life. There is no rule of life contained in the precept that a man should pursue his own happiness. Many men think that they are seeking happiness when they are only seeking the gratification of some particular passion, the strongest that they have. The end of a man is, as already explained, to live conformably to nature, and he will thus obtain happiness, tranquillity of mind, and contentment” source