Deuteronomy 10:20. Moses says, “You shall fear the Lord your God; you shall serve Him and cling to Him…” What does it mean to “cling to Him?” It is actually the same Hebrew word which is used of Adam in the garden when it says, “a man shall leave his father and his mother, and shall cleave to his wife, and they shall become one flesh.” (Genesis 2:24)
But how is this cleaving done in practical terms? The Rabbis ask, “Is it possible for a man to cleave to the Divine Presence, seeing that it is written, “For the LORD thy God is a devouring fire?”
They answer the question by suggesting that “clinging to God” can be accomplished by clinging to the servants of God, i.e. those who teach Torah. This is explained specifically as the act of discipleship to a man of Torah who is already connected with God and can teach you the way to God.
Chasidic Judaism believes that through clinging to one’s rebbe (spiritual leader), one is brought into union with his rebbe. Because the rebbe is in union with God, the disciple is also elevated into union with God by virtue of that connection. In the same way, our Rebbe, Yeshua, taught us that in order to cling to God we must cling to him (John 15:1-7) and by clinging to him, we cling to God. “In that day you will know that I am in my Father, and you in me, and I in you.” (John 14:20)
Just as Adam’s cleaving to his wife made him one flesh with her, Yeshua’s perfect cleaving to God makes him ‘One with the Father.’ When we cleave to him, we become one with Yeshua, and thus we enter the unity of his relationship with God. (John 17:21-23)
Paul teaches the principle of clinging to Messiah. In 1 Corinthians 6:16-17 he declares, “‘The two shall become one flesh.’ The one who joins himself to the Lord is one spirit with Him.” To the Ephesians he writes, “We are members of His body, [as it is written,] ‘For this reason a man shall leave his father and mother and shall be cleave to his wife, and the two shall become one flesh.’ This mystery is great; but I am speaking with reference to Messiah and the Assembly.” (Ephesians 5:30-32 quoting Genesis 2:24)
Therefore, in the Messianic interpretation, the commandment to “cling to God” can only be fulfilled by clinging to the Master.