An indulgence is not permission from the Church to indulge in sin. It is not being indulgent with sinners. It is not the pardon of sin nor the remission of guilt. Now according to the Catechism of ...

remission of penalties that would otherwise be severe. Q. 841. Is an Indulgence a pardon of sin, or a license to commit sin? A. An Indulgence is not a pardon of sin, nor a license to commit sin ...