Musar su Ecclesiaste 7:1

We find that a desirable death for man is the exact opposite of what is deemed a desirable death for the animal. Whereas man prefers death at the hands of G–d, i.e. not through murder at the hands of human beings, the animal achieves its state of "holiness" only when executed by man, not when it dies from natural causes. The reason is that man's body is the sheath for his soul. Through partnership of body and soul man observes the laws of Torah and Avodah in the sense of היום לעשותה ולמחר לקבל שכרם, to perform the commandments "today" while alive on earth, and to receive the reward for such performance "tomorrow," i.e. after death of the body, in the Hereafter. This is why the day of death is described by Solomon as superior to the day a person is born, since it is the day the spirit returns to G–d and the body finds rest in the grave (Kohelet 7,6). If body and soul are separated prematurely (through murder or other violence leading to death), whoever is responsible has separated Torah and Avodah from the direction and the time frame intended by G–d for that person.