Most likely the first parents brought it with them out of the garden in which they had their first dwelling.

We all do know, however, that it has never perished entirely out of mind.

By some peoples it was lost, but not by all; in some ages it dulled and faded, in others it was overwhelmed with doubts; but, in great goodness, God kept sending us at intervals mighty intellects to argue it back to faith and hope.
"Why should there be a Soul in every man?
Look, O son of Hur--for one moment look at the necessity of such a device.

To lie down and die, and be no more--no more forever--time never was when man wished for such an end; nor has the man ever been who did not in his heart promise himself something better.

The monuments of the nations are all protests against nothingness after death; so are statues and inscriptions; so is history.