For the advantage of the whole

 The George Long translation of 1862:

Nothing is injurious to the part, if it is for the advantage of the whole.  Marcus Aurelius.  Meditations. Book 10.

Chrystal's 2017 rendering based on the Foulis translation of 1742:

Nothing is hurtful to the part which is profitable to the whole. Marcus Aurelius.  Meditations. Book 10.

Image:  End view of a Roman testudo formation used to defend against missile weapons courtesy of Pinterest.