I. Purification of the Heart

From The Catechism of the Catholic Church

2517
The heart is the seat of moral personality: “Out of the heart come evil
thoughts, murder, adultery, fornication….”³⁰⁴ The struggle against
carnal covetousness entails purifying the heart and practicing temperance:

PART THREE: LIFE IN CHRIST

SECTION TWO THE TEN COMMANDMENTS
- CHAPTER TWO YOU SHALL LOVE YOUR NEIGHBOR AS YOURSELF
  - Article 9 THE NINTH COMMANDMENT
    - I. Purification of the Heart

From The Catechism of the Catholic Church – rosary.team