1 Corinthians 3:1
Immaturity and Self-deception
3:1 So, brothers and sisters, I could not speak to you as spiritual people, but instead as people of the flesh, as infants in Christ.
1 Corinthians 5:5
5:5 turn this man over to Satan for the destruction of the flesh, so that his spirit may be saved in the day of the Lord.
1 Corinthians 6:16
6:16 Or do you not know that anyone who is united with a prostitute is one body with her? For it is said, “The two will become one flesh.”
1 Corinthians 15:50
15:50 Now this is what I am saying, brothers and sisters: Flesh and blood cannot inherit the kingdom of God, nor does the perishable inherit the imperishable.