Isaiah is clear that our spiritual propositions must stand the test of Biblical scrutiny of texts which have their impact on them. Your proposition of Paul's words, which are known to be hard to be understood by even the great Apostle Peter, does not stand the test of Genesis 2:7, but no doubt you will stubbornly hold to it.
I hold to the truth of God's word that teaches us that we are body, soul and spirit.
This part of Isaiah 28 is for us to take in carefully:
Listen to the Teaching of God
23 Give ear and hear my voice,
Listen and hear my speech.
24 Does the plowman keep plowing all day to sow?
Does he keep turning his soil and breaking the clods?
25 When he has leveled its surface,
Does he not sow the black cummin
And scatter the cummin,
Plant the wheat in rows,
The barley in the appointed place,
And the spelt in its place?
26 For He instructs him in right judgment,
His God teaches him.
27 For the black cummin is not threshed with a threshing sledge,
Nor is a cartwheel rolled over the cummin;
But the black cummin is beaten out with a stick,
And the cummin with a rod.
28 Bread
flour must be ground;
Therefore he does not thresh it forever,
Break
it with his cartwheel,
Or crush it
with his horsemen.
29 This also comes from the Lord of hosts,
Who is wonderful in counsel and excellent in guidance.