Marcus Aurelius
Meditations 10.2
Observe what thy nature requires, so far as thou art governed by nature only: then do it and accept it, if thy nature, so far as thou art a living being, shall not be made worse by it. And next thou must observe what thy nature requires so far as thou art a living being. And all this thou mayst allow thyself, if thy nature, so far as thou art a rational animal, shall not be made worse by it. But the rational animal is consequently also a political [social] animal. Use these rules, then, and trouble thyself about nothing else.
Marcus Aurelius, Meditations 10.2, translated by George Long
Observe what thy nature asks of thee, as one controlled by Nature alone, then do this and with a good grace, if thy nature as a living creature is not to be made worse thereby. Next must thou observe what thy nature as a living creature asks of thee. And this must thou wholly accept, if thy nature as a rational living creature be not made worse thereby. Now the rational is indisputably also the civic. Comply with these rules then and be not needlessly busy about anything.
Marcus Aurelius, Meditations 10.2, translated by C. R. Haines