I agree with you on this, but am in complete disageement with your position on abortion, specially in your position that birth is the only viable bright line.
Your position allows for killing those who would be capable of living outside of their mother's wombs if they were delievered instead of being aborted.
“Since we are created by a spiritual Source, in His image, we are also essentially spiritual and not ultimately subject to human, material conditions”.
Now we are into theology.
Man is not “essentially spiritual”. Man is a creature of dual natures, oneness in being. We are body and soul and have been promised that we will claim our body in a new and glorious form when we are received into heaven.
To redeem us, Christ assumed human form and became one of us. He made himself subject to human “conditions and material”. He became man for us, and as a man, assumed our transgressions and redeemed them by offering His human Body on the Cross.
The Incarnation, Christ Jesus, means something. It is the validation of our humanity and the very purpose of our Redemption—to pay the ransom for our sins by the offering of His human “material”—His Body—on the Cross.