IV. The Gravity of Sin: Mortal and Venial Sin

From The Catechism of the Catholic Church

1859
Mortal sin requires full knowledge and complete consent. It presupposes
knowledge of the sinful character of the act, of its opposition to God’s law.
It also implies a consent sufficiently deliberate to be a personal choice.
Feigned ignorance and hardness of heart¹³³ do not diminish, but rather
increase, the voluntary character of a sin.

PART THREE: LIFE IN CHRIST

SECTION ONE MAN’S VOCATION LIFE IN THE SPIRIT
- CHAPTER ONE THE DIGNITY OF THE HUMAN PERSON
  - Article 8 SIN
    - IV. The Gravity of Sin: Mortal and Venial Sin

From The Catechism of the Catholic Church – rosary.team