Religion is an activity, So is there a true activity? Yes the true activity is to WORSHIP GOD IN SPIRIT AND TRUTH. Not doing so negates your own existance and denies that part of the human experience that is most like God. Worship him with the part of you that was created in His similitude! When this is done and "keeping yourself unspotted from the world" this is True religion and pleasing to God: The Creator of All.