The strong and the weak
A person who is emotional is weak. Undefined in his decisions, undefined in faith, he is a slave to others' opinions. This makes him unhappy, even though he believes in God.
…while we do not look at the things which are seen, but at the things which are not seen. For the things which are seen are temporary, but the things which are not seen are eternal. 2 Corinthians 4:18
The person who is born of the Spirit is spirit. He lives by intelligent faith rather than being influenced by what he sees, his feelings or his emotions. He believes by faith and never needs to see to believe.
Is this crazy? Certainly, for the secular world it is.
But not in the world of faith, in the Kingdom of the Spirit of God.
Only those who are born again can see the Kingdom of the Spirit of God. John 3.3
Only those who are born of the water and the Spirit will enter the Kingdom of the Spirit of God. John 3.5
Only those who are born of God are able to win the war of salvation, because they use supernatural faith.
But the one who is born of emotion -the one born of the flesh or the natural man- does not have the Holy Spirit to discern the world of supernatural faith.
Because of this, he does not have the courage to make a serious commitment to God, to deny his own will, take up the cross and follow Him. Thus, he's literally a coward. At the slightest sound of the war drums, he runs away. He does not have the courage to say ‘no’ to sin nor to face diabolical injustices.
His emotional faith makes him too shy to face his relatives, friends and acquaintances.
The same is not true of those who are born of God. Their faith is solid, grounded -- grounded in the Divine Word. They do not care about other people's opinions.
And if all forsake them because of their faith, they become stronger.
From their weakness, they draw strength and take possession of the promises of God.
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