Zechariah 8:16
These are the things which you should do: speak the truth with one another; judge with truth and pronounce judgement that brings peace in (the courts at) your gates.

Sin creates a tangle for our souls, spirits, families, and lives. A choice is made that the benefit of sin outweighs the benefit of truth. Except, the truth sets us free. Truth has nothing to hide, and yes, we sometimes make errors, but we are to confess the error, change, and move on. A life of truth brings peace.