Think with me ...  If I could convince you to believe a lie, could I destroy your life? Think about all the lives that have been destroyed by lies related to things like drugs, gambling, suicide, "free sex", "do what you feel like doing".   The idea of "my truth is as good as your truth" is also one of those lies.   Only that which is really "truth" sets us free, and when we seek to follow God and His ways, He guides us into the ways of truth, the ways that truly bring life, life to the full!