Powerful Word

"For the word of God is living and powerful, and sharper than any two-edged sword, piercing even to the division of soul and spirit, and of joints and marrow, and is a discerner of the thoughts and intents of the heart." Hebrews 4.12

It's the only word capable of generating power to create, save and transform any human being. God does not require perfection, holiness, purity or any other virtue. Only a vote of confidence that He will do everything He promised to do. Those who propose themselves to believe in it will have the Personal Answer from the Almighty.

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.

The difference

"Then you shall again discern between the righteous and the wicked, between one who serves God and one who does not serve Him." Malachi 3.18

Those who are born of the Spirit are essentially different.

If a person says he or she is a child of God but their behaviour is not different from those who live according to the course of this world, they are deceiving themselves.

Those who are born of the Spirit bear the image of God Almighty, that is, His character.

The only way the world will see and know the invisible God is through His children.

As Jesus said, "Who sees Me sees the Father."

The letter kills

"...who also made us sufficient as ministers of the new covenant, not of the letter but of the Spirit; for the letter kills, but the Spirit gives life." 2 Corinthians 3.6

The true servants of the Holy Spirit of God transmit Spirit to those who are thirsty for the Spirit.
The other "servants" are concerned with imparting empty knowledge of life that imposes deadly burdens. One must be born of the Spirit to have this discernment. 

Discernment

"But You have seen, for You observe trouble and grief, to repay it by Your hand. The helpless commits himself to You; You are the helper of the fatherless." Psalms 10:14

We can clearly see in these last days, the election of the children of the Light, with their discernment as to what is best for the cause of our Lord, while those who are corrupted spread lies and deceits.