Speaking the truth in love

so that you might grow up in all things into Him who is the Head, that is, the Christ

From whom the whole body being fitted and united together

through each supporting ligament

according to the working within its zone of influence of each individual member

causes the growth of the body for the building up of itself in love.

Eph. 4:15, 16.

make straight paths for your feet, so that the limb which is impaired may not be dislocated, but rather be healed.

Hebrews 12:13

The phrase “zone of influence” is the word μετρον (“metron”) in Greek. The idea Paul is bringing out is that you as an individual are a member of the Body of Christ and vitally connected to other members. These other members are those that are within your zone of influence.

You have a responsibility towards those members of the body that are within your zone of influence that you do your part in building them up. Don’t wrench yourself from them or try to get away (or your way). God has placed you there, do your part in causing growth.

The opposite side of the coin is that you should also mind your own business. Don’t interfere where you are not connected. So many people think they have influence where they actually do not. If you are not vitally connected to someone don’t interfere with what God is doing with them.