1 Corinthians 15:46

However, the spiritual is not first, but the natural; and then the spiritual.

Romans 6:6

We know that our old self was crucified with him so that the body of sin might be done away with, that we should no longer be slaves to sin.

Ephesians 4:22-24

You were taught, with regard to your former manner of life, to put off your old self, which is being corrupted by its deceitful lusts;

Colossians 3:9-10

Do not lie to one another, since you have put off the old self with its practices

Treasury of Scripture Knowledge

Summary

Howbeit that was not first which is spiritual, but that which is natural; and afterward that which is spiritual.

Bible References

That which is natural

Romans 6:6
We know that our old self was crucified with him so that the body of sin might be done away with, that we should no longer be slaves to sin.
Ephesians 4:22
You were taught, with regard to your former manner of life, to put off your old self, which is being corrupted by its deceitful lusts;
Colossians 3:9
Do not lie to one another, since you have put off the old self with its practices