III. The Different Kinds of Sins

From The Catechism of the Catholic Church

1853
Sins
can be distinguished according to their objects, as can every human act; or
according to the virtues they oppose, by excess or defect; or according to the
commandments they violate. They can also be classed according to whether they
concern God, neighbor, or oneself; they can be divided into spiritual and
carnal sins, or again as sins in thought, word, deed, or omission. the root of
sin is in the heart of man, in his free will, according to the teaching of the
Lord: “For out of the heart come evil thoughts, murder, adultery,
fornication, theft, false witness, slander. These are what defile a man.”¹²⁸
But in the heart also resides charity, the source of the good and pure works,
which sin wounds.

PART THREE: LIFE IN CHRIST