Another pro-life / anti-contraceptive motif is in
St. Thomas's commentary on Matt. 19:18, where he explains why ☧ omitted mentioning the First Tablet's commandments (1st-4th, ∵ he know the rich young man already loved God), but mentions the 5th-8th, and explains why they are ordered that way:
non homicidium facies, quod est contra vitam in actu; non adulterabis, quod est contra vitam in potentia
Thou shalt do no murder, which is opposed to actual life: Thou shalt not commit adultery, which is opposed to life in potency
(Interestingly, ☧ didn't mention 9th or 10th, and so the rich young man doesn't lie in v. 20 when, although
he committed the sin of covetousness, he says "All these have I kept from my youth".)
Existence (≡ divine essence!) is sacred! St. Thomas's pithy summary of the 6th commandment reminded me of that.
Elige vitam semper.