According to the Talmud, "Sleep is one sixtieth of death."
If sleep is a form of death, then it is also true that death is a form of sleep.
Sleep is not a termination or even an interruption of life. Rather, it is a time of foment, the means by which body and soul recoup their energies for a fresh and refreshed onslaught upon the coming day. So is death. Death is a "descent for the sake of ascent," a retraction of the arrow of life so that it can be impelled by the bow of vacuity with redoubled force.
Sleep is one sixtieth of death? Where in the Talmud does it say that sleep is one-sixtieth of death?
In Brachot 57b:13. From Sefaria:
"The numbers five, six, and ten are mnemonics for the categories to follow. The Gemara says: There are five matters in our world which are one-sixtieth of their most extreme manifestations. They are: Fire, honey, Shabbat, sleep, and a dream. The Gemara elaborates: Our fire is one-sixtieth of the fire of Gehenna; honey is one-sixtieth of manna; Shabbat is one-sixtieth of the World-to-Come; sleep is one-sixtieth of death; and a dream is one-sixtieth of prophecy."