For this cause ye shall have fulness of joy. That is, because of their desires because of their additional ministry, because their hearts were completely riveted on the gospel cause, because their eye was single to his glory, they would eventually, in the resurrection, have fulness of joy in that day when they would sit down in the kingdom of the Father. A fulness of joy comes not in this life (D&C 101:36) but in the resurrection, where body and spirit are joined inseparably (D&C 93:33; D&C 138:17).