Each of us has a “part of G‑d,” so to speak, inside of us. It is the neshamah, the soul. It is pure, untainted, and closely connected to its source, the source of all knowledge—G‑d Himself.
Immediately after death, in the very first stage of its ascent, the soul’s main concern is that “its” body—its partner over many decades—receive a proper Jewish burial. The soul cries out in pain if its body is treated disrespectfully, and screams in unimaginable horror if its beloved body, a holy vessel, is put to the flame. When the body is alive, the body feels pain. When the body can no longer feel pain—i.e., when it dies—the soul feels its partner’s “physical” pain at a highly spiritual level.
Explore more on this subject inCremation or Burial? A Jewish View by Doron Kornbluth (Mosaica Press, 2012).