De Plantatione

Now these cannot have been trees of the land, but must indisputably have been plants of a rational soil, which was a road to travel along, leading to virtue, and having for its end life and immortality; and another road leading to vice,

having for its end the loss of life and immortality, that is to say, death. Therefore, we must suppose that the bounteous God plants in the soul, as it were, a paradise of virtues and of the actions in accordance with them, which lead it to perfect happiness.