King James Version
If any man will do his will, he shall know of the doctrine, whether it be of God, or whether I speak of myself.New International Version
If anyone chooses to do God's will, he will find out whether my teaching comes from God or whether I speak on my own.Catholic Public Domain Version
If anyone has chosen to do his will, then he will realize, about the doctrine, whether it is from God, or whether I am speaking from myself