Jehovah's Witnesses, how can a person with the Earthly Hope obtain righteousness in the eyes of God?

Jesus identified in the Bible what is necessary to gain God's favor by taking in knowledge about the truth of God and the one he sent forth, Jesus Christ, repent and exercise faith in Jesus ransom sacrifice, and do the will of God and Jesus by making disciples and teaching others. (John 17:3; Acts 3:19; Hebrews 10:7; Matthew 28:19, 20)