Thomas Aquinas

“ I answer that, In the state of innocence there would have been generation of offspring for the multiplication of the human race; otherwise man's sin would have been very necessary, for such a great blessing to be its result. We must, therefore, observe that man, by his nature, is established, as it were, midway between corruptible and incorruptible creatures, his soul being naturally incorruptible, while his body is naturally corruptible. We must also observe that nature's purpose appears to be different as regards corruptible and incorruptible things. ”

“ We must be far from supposing that offspring could not be begotten without concupiscence. All the bodily members would have been equally moved by the will, without ardent or wanton incentive, with calmness of soul and body. ”

“ In paradise man would have been like an angel in his spirituality of mind, yet with an animal life in his body. After the resurrection man will be like an angel, spiritualized in soul and body. Wherefore there is no parallel. ”