The other morning, a couple of our neighbourhood "Jehovah's Witnesses" came knocking at my door. We discussed the resurrection of Jesus. The man explained that at his resurrection, the Lord divested himself of his body and became a "spirit person". I pointed out that in Luke's resurrection narrative, Jesus explicitly denies this saying, 'a spirit does not have flesh and bones as you see I have.' (Luke 24:39.) The man responded that Jesus seemed to have had a body, but that was just for appearance's sake. So, we can add post-resurrection Doceticism to the list of JW heresies.
It is highly important to realise that Jesus retained his full humanity when he was raised from the dead. Granted, his body was transformed and ultimately glorified, but it was the same body that was nailed to the cross and buried in a tomb. Jesus' resurrection was the pledge of a new creation. The JW's are supposed to be strong on the eschatological future of the earth. But it seems to have escaped them that if Jesus abandoned his body to become 'spirit', then the value of physical creation is undermined. God said of the original creation with Adam at it's head, "It is very good!" Of the renewed creation, headed up by the Last Adam, God might say, "It is very glorious!"
In addition, Christ's Lordship is conditioned by his humanity. As 'Rabbi' Duncan put it, 'The dust of the earth is an integral part of us. The dust of the earth is on the throne of the Majesty on High.' Donald Macleod's reflects further,
'The Lord's post-resurrection sovereignty is modified and enriched by all the experiences of his incarnate life. In its pre-resurrection phase the sovereignty had all the advantages of his love, pity and omniscience. It still retains these but now it is enhanced by his involvement in the common lot of men during his earthly ministry. Even for God, the only way to learn compassion is by experience. Today, the memories of Nazareth and Cana, of poverty and pain, of temptation and suffering, of Gethsemane and Calvary, are imprinted indelibly on the Lord's memory and profoundly influence the way he runs his administration. It is as the Lamb who bore the sin of the world that he now sits on the throne (Rev. 5:6). He remembers that we are dust and knows our humanness from the inside. He can say, as he observes us, 'I know exactly how that woman feels!' And because he himself lived on the outer limits of human endurance he can ensure that we shall not be tested above what we are able to bear.'
(From Glory to Golgotha, Christian Focus, 2002, p. 129 for Duncan quote and p. 137-138 for the rest)