Не о себе только каждый заботься, но каждый и о других.
not looking to your own interests but each of you to the interests of the others.
Let each of you look not only to his own interests, but also to the interests of others.
do not merely look out for your own personal interests, but also for the interests of others.
Don’t look out only for your own interests, but take an interest in others, too.
Look not every man on his own things, but every man also on the things of others.
Let each of you look out not only for his own interests, but also for the interests of others.
regarding not each his own [qualities], but each those of others also.