John 6:56

Dwelleth in me, and I in him - Of all connections and unions, none is so intimate and complete as that which is effected by the digestion of aliments, because they are changed into the very substance of him who eats them; and this our Lord makes the model of that union which subsists between himself and genuine believers. He lives in them, and they in him; for they are made partakers of the Divine nature: 2 Peter 1:4. To this verse the following addition is made in the Codex Bezae, three copies of the Itala, and Victorinus. After these words - dwelleth in me, and I in him, they add, as the Father in me, and I in the Father. Verily, verily, I say unto you, that unless ye receive the body of the Son of man as the bread of life, ye have not life in him. This is a very remarkable addition, and is between thirteen and fourteen hundred years old.

Dwelleth in me - Is truly and intimately connected with me. To dwell or abide in him is to remain in the belief of his doctrine, and in the participation of the benefits of his death. Compare John 15:1-6; John 17:21-23.

I in him - Jesus dwells in believers by his Spirit and doctrine. When his Spirit is given them to sanctify them; when his temper, his meekness, his humility, and his love pervade their hearts; when his doctrine is received by them and influences their life, and when they are supported by the consolations of the gospel, it may be said that he abides or dwells in them.