William Burkitt on Philippians 2:4

The apostle here, dissuadeth from another sin, which is very destructive of unity and peace, of concord and love; and that is, the sin of inordinate self-love, whereby we regard only our own honour and profit, wholly neglecting the concerns of others. Look not every man on his own things; that is, his own provate advantage only or chiefly, but take care of the things which tend to the advantage of others.

Not but that a Christian may and ought to look at his own things, but not wholly: our regard must extend further than ourselves, and our own things; we must look on the things of others also; we must be as just and true to another's reputation as to our own, and regard both the honour and profit of our neighbour as well as our own: and where Christians are of this public spirit and temper, it contributes much, very much, towards the preserving and maintaining of unity and peace among them.