1 Corinthians 3:3-4

3:3 for you are still influenced by the flesh. For since there is still jealousy and dissension among you, are you not influenced by the flesh and behaving like unregenerate people? 3:4 For whenever someone says, “I am with Paul,” or “I am with Apollos,” are you not merely human?

1 Corinthians 2:14

2:14 The unbeliever does not receive the things of the Spirit of God, for they are foolishness to him. And he cannot understand them, because they are spiritually discerned.

Matthew 16:23

16:23 But he turned and said to Peter, “Get behind me, Satan! You are a stumbling block to me, because you are not setting your mind on God’s interests, but on man’s.”

Romans 7:14

7:14 For we know that the law is spiritual – but I am unspiritual, sold into slavery to sin.