The Son incorporates our human nature into His divine nature by hypostatic union accomplished through the indwelling of the Holy Spirit.
I don't know what the 'limit' of that is for an earthbound creature, but I do know that His mercy, and His gifts, are without measure and according to the evidence of the saints, it's more than we can possibly imagine.
Well, by extension what flows from above permeates down, so those closer to God are visible in their graces (for those who have the eyes to see) and as God gives Himself to them, as Sons and Daughters of God, they give themselves to us.
We are, however, all One Body — this is the Doctrine of the Mystical Body.
This is another aspect of 'tradition' that the modern world is almost entirely ignorant of; it doesn't understand, and in its ignorant assumptions, is not interested in understanding.
Today, for example, everybody wants to be a celebrity. Everybody wants their 15 minutes of fame. That's not what God wants, it's not what the great traditions teach. People at some point will have to get it into their heads that 'progress' is heading up a blind alley.