16:13
`` Jesus tells just how to know the truth . ` If any man will do his will , he shall know of the doctrine , whether it be of God , or whether I speak of myself -LRB- John 7:17 -RRB- . The way to know is to obey . ` Howbeit when he , the Spirit of truth , is come , he will guide you into all truth ' -LRB- John 16:13 -RRB- . `` The secret then is out , it is as plain as day . It is this -- Jesus brought the truth to the world , and the Holy Spirit is everywhere present to lead men into that truth . Wherever and whenever a person desires to know the truth that he may obey it , there the Spirit of God will be to enlighten and to lead .