When Christians talk about “the heart” in relation to abortion — or any other immoral act — we’re talking about the interior reality that God judges — the intentions, fears, pressures, wounds, and moral responsibility that shape the act. Abortion is objectively evil, but the interior involvement can include desperation, coercion, confusion, or even a distorted sense of compassion.
Christian moral theology never treats the act alone as the whole story. God judges both the act and the heart, and that means Christians have to consider the mother’s circumstances, the pressures she faces, the moral formation she received, and the degree of freedom or fear involved. The heart matters because charity, responsibility, and the willingness to protect life are interior realities before they ever become external actions.
And this is exactly why Christians cannot judge the way humans often do — by the act alone. If God judged us solely on the worst thing we ever did, without considering the heart, the wounds, the intent, or the circumstances, every one of us would be condemned.
We can be sure that Christ's judgment will be just taking all things into consideration.
But that does not mean we should not make the physical act illegal.