The brother of Jared had declared that: “I knew not that the Lord had flesh and blood.” The Lord did not clarify at that time, but does here. What the brother of Jared sees is the “body of my spirit.” The spirit body has the same form and appearance (at least to mortal eyes) as physical flesh and blood, even though it is not flesh and blood. That clothing of the spirit body in physical reality comes later, when the Lord comes “in the flesh.”