1 Corinthians 15:46
Howbeit that was not first which is spiritual, but that which is natural; and afterward that which is spiritual.
Cross-reference
1 Corinthians 2:14
Parallel
1 Corinthians 2:14 reinforces that the natural person cannot grasp spiritual things — the same contrast between natural and spiritual priority.
Ephesians 4:22–24
Parallel
In Ephesians 4:22-24, putting off the old self and putting on the new self mirrors the natural-first-then-spiritual sequence.
Colossians 3:10
Parallel
Colossians 3:10 describes putting on the new self, which reflects the spiritual renewal that comes after the natural — paralleling the order here.