How does Graham Greene portray Scobie’s character as contradictory in the division between his good intentions and sinful actions? How are pity and responsibility the cause of this conflict?

The character of Henry Scobie emerges as deeply conflicted in The Heart of the Matter. His devotion to his wife, Louise, is challenged by his passion for Helen, a young woman who pops up randomly in his life. Any true affection he feels for either of them, however, is tempered by his sense of pity—an emotion that emerges from a selfishly superior attitude. His sense of responsibility, no matter how much he rationalizes his behavior, becomes an excuse for immoral and ethical actions.
Scobie’s commitment to helping Louise achieve her goal of moving away leads to his involvement with illegal financial dealings. The more he contrives to find a way to reconcile these contradictions, the deeper the hole he digs for himself. Not just committing adultery but also confessing without any intention to repent are considered sins in Scobie’s Catholicism. The crisis of faith, which has been brewing for a while without his acknowledging it, overwhelms him when he opts for suicide.