God, Jesus & the Holy Spirit
A willingness to do God's will helps a person recognize whether Jesus' teaching is from God.
Cited Scripture
John 7:17.
Read Cited Scripture (KJV) John 7:17
King James Version
John 7:17
17If any man will do his will, he shall know of the doctrine, whether it be of God, or whether I speak of myself.
Scripture quotations are from the King James Version (KJV).