The purpose and the main point of everything and all that is intended in the entire Torah and 613 mitzvot is to bond through them to the living G-d, and realize the first statement that we heard from the Almighty: “I am the Lord your G-d!” And it is said (Deut. 4) “and you are bonded with the Lord”—[in other words] all have a connection to this bond because [as it is stated] “a part of G-d is His people.” This is a source of constant joy….this is a happiness that has no sadness and nothing can interfere or restrain this happiness—that he has merited to be a part of the living G-d. And even if he has sunk to a low place and his sins immeasurably numerous, still, the connection of his root has not been cut off from its source, this is impossible ….as it says לא ידח ממנו נדח . But God does not take away life; instead, He devises ways so that a banished person may not remain estranged from Him. (Samuel 2–14:14).
~ Rabbi Zadok ha-Kohen Rabinowitz of Lublin, Resisay lyla 53