Know that, although human souls have existed upon the earth for a myriad ages and cycles, the human soul is nonetheless originated. And since it is a sign of God, once it has come into being it is everlasting. The human spirit has a beginning but no end: It endures forever. Likewise, the various species found upon the earth have an origin in time; for it is acknowledged by all that there was a time when these species existed nowhere on the face of the earth, and indeed a time when the earth itself did not exist. But the world of existence has always been, for it is not confined to this terrestrial globe. ‘Abdu’l‑Bahá, Some Answered Questions. Available from www.bahai.org/r/420230892