CCC 2485
Life in Christ›SECTION TWO THE TEN COMMANDMENTS›CHAPTER TWO YOU SHALL LOVE YOUR NEIGHBOR AS YOURSELF›III. Offenses Against Truth
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.