There is a bond, a spiritual tie, which binds together all the children of God. This is not a tie to human beings or mortals, and that is why those who persist in remaining on
the human or mortal level ultimately drift out of the experience of the more spiritually illumined. Each one draws unto himself those with whom he is spiritually united, his
spiritual brothers and sisters; but those who live and insist on living on the mortal or material plane sooner or later drift away from him, and sometimes the greatest heartaches come from trying to hold on to them.
Joel S. Goldsmith in The Art of Spiritual Healing, ch. the Relationship of Oneness.