Tamim Tihyeh Im Hashem Elokecha:[1]
The verse states “And you shall be complete – Tamim – with Hashem your G-d.” What is the intent of this command and instruction? How does one become complete with G-d? The intent is as follows: In order to reach completeness of soul one needs to have the name of Havayah be drawn down upon him to become his personal G-d. How is this accomplished? Through the complete fulfillment of Mitzvah’s. Only then will one be complete and whole in every limb of his soul. However, if one lacks even one Mitzvah or has blemished his soul with a transgression, then his soul is considered to be lacking a limb, as the completion of the lives of one’s soul is dependent on drawing down the divine energy found within the supernal limbs of the king, which refer to the Mitzvah’s. The Mitzvah’s are the energy of all of the limbs of the soul and without them the limbs of the soul contain no energy or existence. Now, what does one do if he has already sinned upon his soul and blemished it through either transgressing a negative command or nullifying the fulfillment of a positive command? How does he fix this? So, on this it states “and this Mitzvah is not very far” which refers to the Mitzvah of repentance. Through true repentance one is able to return the light of G-d to his soul to fill all of its lacking’s and cure all of its blemishes.
[1] Likkutei Torah p. 45b