We have two choices. Either immortality comes to us as a gift from God, or God made us immortal from the beginning. I put it to you that immortality is a gift, a gift that comes to us on the day of the resurrection, at the second coming of Jesus. I could cite many scriptures to support this, but only one should suffice.
1 Cor. 15:51 ¶ Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed,
52 In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.
53 For this corruptible must put on incorruption, and this mortal must put on immortality.
54 So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory.
Allow me to paraphrase the above texts, and reduce them to just the bolded portions.
We shall all be changed at the last trump: for the trumpet shall sound, and this mortal must put on immortality.
Permit me to quote from a sermon by Amos Phelps:
This doctrine (the immortality of the soul) can be traced through the muddy channels of a corrupted Christianity, a perverted Judaism, a pagan philosophy, a superstitious idolatry to the great instigator of mischief in the garden of Eden. The Protestants borrowed it from the Catholics, the Catholics from the Pharisees, the Pharisees from the pagans, and the pagans from the old serpent who first preached the doctrine amid the lowly bowels in paradise to an audience all too willing to hear and heed the new and fascinating theology…“Ye shall not surely die”. (Genesis 3:4)
It is a strange infatuation that the vast majority of Christianity today teaches a doctrine, the immortality of the soul, based on no greater authority than that of the great deceiver.