There are two kinds of non-existence, says Aquinas, and they are usually called …
Negation: When there is an absence of a thing that does not necessarily have to be there
Privation: When there is an absence of a thing that should be there
For example, blindness among humans is a privation because humans should be able to see. The ability to fly, on the other hand, for humans, is a negation because human nature is not intrinsically designed for levitation (as opposed to sight).
You can also say, that pri
vations are evil. Privations are not necessarily moral evils … but a lack of something that prevents completeness if a thing.
Goodness pertains to the fulfillment/completeness of an existence. For example, it is good for a man to have sight, because sight is necessary for him to be a complete human being (otherwise, technically he would be lacking something).
However, there is extra goodness that can be achieved, such as a human’s ability to fly. You could call this a grace or … I forget the word (preternatural … ?). Anyway, though such things are not necessary for the completion of a thing’s existence/nature, it still is an added bonus … an extra power that comes from God … an additional perfection that is better than not having it. It is better because when we (or anything) receives more perfections we become more like God, who has all perfections. We become complete in a supernatural (or in some cases merely preternatural) way. Growing in God’s image and likeness is good, no? And it is always preferred to not growing in God’s image and likeness.
In that,** we see existence is better than non-existence, for to exist is to be more like God. **It is not necessary for God to create us, for our initial non-existence is a negation, and not a privation, but he choses to grace much of his ideas of beings into existence as a gift (not a necessity). And once again, it is better for something to exist, because it then becomes more like God.
Now, another important thing is that if someone fails and goes to hell …
is it not better that they never existed in the first place? No. *People in hell are more fortunate than those who do not exist altogether. * And it is because they exist. Various writings of mystics have attested to this.
*What about the passage when Christ says that it would have been better if Judas had never been born? * Does this not seem to disprove what I said? I don’t think so. There are two ways to interpret this passage correctly, I think …
- It would have been better if Judas had failed to be born (i.e. died before his birth … in the womb of course) than to have sinned such a great sin and damn his soul to hell.
- [and this is theological controversial, and I don’t know if I agree with this] Better to die in the womb (and go to heaven as an infant) than sin such a great sin and suffer such an excruciating punishment in purgatory (just in case Judas managed to go to heaven in God’s infinite mercy somehow) … this possibility of course brings into question the reality of limbo for unbaptized infants (and I am undecided on the issue personally)
So, there you go. I hope this answers some questions.