III. Offenses Against Truth

From The Catechism of the Catholic Church

2485
By its very nature, lying is to be condemned. It is a profanation of speech,
whereas the purpose of speech is to communicate known truth to others. the
deliberate intention of leading a neighbor into error by saying things contrary
to the truth constitutes a failure in justice and charity. the culpability is
greater when the intention of deceiving entails the risk of deadly consequences
for those who are led astray.

PART THREE: LIFE IN CHRIST

SECTION TWO THE TEN COMMANDMENTS
- CHAPTER TWO YOU SHALL LOVE YOUR NEIGHBOR AS YOURSELF
  - Article 8 THE EIGHTH COMMANDMENT
    - III. Offenses Against Truth

From The Catechism of the Catholic Church – rosary.team