על הבריחה והמציאה י״בOn Flight and Finding 12

א׳
1[62] Now, it was quite fitting that different regions should be allotted to different things, heaven to a good thing, the earthly parts to an evil thing. That which is good is a thing upward-soaring; and should it ever come to us, in the bounty of its Father, it hastens, as is meet and right, to retrace its steps; but that which is evil stays here, removed as far as possible from the Divine Company,  making our mortal life its haunt, and incapable of quitting the human race by dying.
ב׳
2[63] This truth found noble utterance in the Theaetetus, where a man highly esteemed, one of those admired for their wisdom, says: “Evils can never pass away; for there must always remain something which is antagonistic to good. Having no place among the gods in heaven, of necessity they hover around the mortal nature and this earthly sphere. Wherefore we ought to fly away from earth to heaven as quickly as we can; and to fly away is to become like God, as far as this is possible; and to become like Him is to become holy, just, and wise.” 
ג׳
3[64] Naturally, therefore, Cain will not die, being the symbol of wickedness, which must of necessity ever live among men in the race that is mortal. There is, then, for the reasons that have been pointed out, definite point in the direction that the manslayer “be put by death to death.”