The only unforgivable sin is to look into the human heart…

All you have done is to be different from other women and you have made a little success of it. This is unforgivable sin…

— Margaret Mitchell

The only unforgivable sin: Being unforgiving.

— Malcolm Forbes

Success is the only unforgivable sin against your neighbor.

— Faina Ranevskaya

Beckett does not believe in God, though he seems to imply that God has committed an unforgivable sin by not existing.

— Anthony Burgess

Despair is the price one pays for setting himself an impossible aim.

— Graham Greene

“Spoiling stories… is an unforgivable sin in this world.”

— Leo Baskerville Pandora Hearts

That is the one unforgivable sin in any society. Be different and be damned!

— Margaret Mitchell

The unforgivable sin is the refusal to pardon.

— George Santayana

The only unforgivable sin is deliberate cruelty.

— Tennessee Williams

There is no word more "dangerous" than liberalism, because to oppose it is the new "unforgivable sin."

— Fulton J. Sheen

“In the eyes of his contemporaries, he was a man who had committed the one unforgivable sin; he was proud of his wealth.”

— Ayn Rand

That we are capable only of being what we are remains our unforgivable sin.

— Gene Wolfe

Despair has been called the unforgivable sin-not presumably because God refuses to forgive it, but because it despairs of the possibility of being forgiven.

— Frederick Buechner

The unforgivable sin of Hitler's Germany was to develop a new economic system by which the international bankers were deprived of their profits.

— Anonymous

Punctuality comes high on my list of unforgivable sins.

— Dorothy Cannell