English Standard Version
If anyone's will is to do God's will, he will know whether the teaching is from God or whether I am speaking on my own authority.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