CATECHISM OF THE CATHOLIC CHURCH
SECOND EDITION

Paragraphs 1874–1877

1874 To choose deliberately - that is, both knowing it and willing it - something gravely contrary to the divine law and to the ultimate end of man is to commit a mortal sin. This destroys in us the charity without which eternal beatitude is impossible. Unrepented, it brings eternal death.
1875 Venial sin constitutes a moral disorder that is reparable by charity, which it allows to subsist in us.
1876 The repetition of sins - even venial ones - engenders vices, among which are the capital sins.
1877 The vocation of humanity is to show forth the image of God and to be transformed into the image of the Father's only Son. This vocation takes a personal form since each of us is called to enter into the divine beatitude; it also concerns the human community as a whole.