Natural man

"But the natural man does not receive the things of the Spirit of God, for they are foolishness to him; nor can he know them, because they are spiritually discerned." 1 Corinthians 2.14

There are only two types of human beings: the natural and the supernatural. The natural man/woman do not receive the things of God because their nature is earthly, natural and Adamic. Therefore, their faith is also natural.
But the supernatural  man/woman obey the Word of the Spirit of God because their nature is heavenly, spiritual and supernatural. Therefore, their faith is supernatural.

Spiritual weapons

"For the weapons of our warfare are not carnal but mighty in God for pulling down strongholds" 2 Corinthians 10.4

Non carnal weapons means spiritual weapons.
And why spiritual weapons?
Because if our war is against the spiritual forces of evil, how to overcome them if we do not have spiritual weapons?
And how could we possess spiritual weapons if we are not spiritual?
And how to be spiritual if we are not born of the Spirit?

Who will enter?

"Who may ascend into the hill of the LORD? Or who may stand in His holy place? He who has clean hands and a pure heart, who has not lifted up his soul to an idol, nor sworn deceitfully." Psalms 24:3,4

Questions and answers of the Spirit of God. Those who have ears to hear and understand must ponder about their situation before God.

Deceit

"But the wisdom that is from above is first pure, then peaceable, gentle, willing to yield, full of mercy and good fruits, without partiality and without hypocrisy."

James 3:17

When one encounters the soul Purifier, a spiritual transformation happens in such a way that the new fruits and compassion testifies of the new life.