Thomas Aquinas Sin Quotations

Sin is a spiritual illness; thus sinners are in need of salvation.

Without sanctifying grace it is not possible to refrain long from mortal sin.

It must be said that charity can, in no way, exist along with mortal sin.

Unbelief is the greatest of sins.

It is a sin directly against one's neighbour, since one man cannot over-abound in external riches, without another man lacking them.

It is a sin to regard the fact that God cannot do the impossible as a limitation on his powers.

Venial sin becomes mortal sin when one approves it as an end. . .

I cannot understand how anyone conscious of mortal sin can laugh or be merry.