“Ye are the children of the L-RD your G-d: ye shall not cut yourselves, nor make any baldness between your eyes for the dead.” – Deuteronomy 14:1, JPS 1917 Tanach
B’nei Yisrael is cautioned against desecrating their bodies through mutilation, as a sign of mourning; although a practice of the heathen nations, cutting oneself out of grief, an expression of pain for the loss of a loved one, is forbidden. Moreover, the prohibition against marring the flesh in regard to mourning, implies that there is no need for the Children of G-d to despair, in regard to the passing away of a life, because H’Shem extends His promise of eternal life (Ramban; Sforno). “I have set before thee life and death, the blessing and the curse; therefore choose life [eternal life]” (Deuteronomy 30:19, JPS).
Why else is B’nei Yisrael forbidden from certain customs that would mar the body? (The sign of circumcision is an exception because it is not considered a marring of the body; rather, it is the removal of that which is superfluous). “G-d said: ‘Let us make man in our image, after our likeness'” (Genesis 1:26, JPS). Man is created in G-d’s image (tzelem); that image should not be desecrated in a physical manner; neither should that image be tainted in the sphere of morality.
“Then the L-RD G-d formed man of the dust of the ground and breathed into his nostrils the breath of life; and man became a living soul” (Genesis 2:7, JPS). Our lives are not finite – there is an eternal nature of the soul. The Hebrew word for man, “adam,” is almost identical to the word for earth, “adamah.” The body of man, composed of the same elements of the earth, returns to the earth. Yet, the soul of man returns to G-d.
“The dust returneth to the earth as it was, and the spirit returneth unto G-d who gave it” (Ecclesiastes 12:7, JPS). At the time of the Tehillas HaMeisim (the Resurrection of the Dead), the soul is restored to the body. “And many of them that sleep in the earth shall awake, some to everlasting life, and some to reproaches and everlasting abhorrence” (Daniel 12:2, JPS).