This is lengthy, but shows the very life of God can only be known through our spirits for God is spirit.
The Spiritual Life. Read (Romans 8:1-17), (Galatians 5:13-26) We can be saved, but yet not spiritual. Anything outside of living by and in accordance with the spirit becomes a life of religious works produced by the flesh which is always against the things of God and will lead to ( spiritual death). We can have the spirit of Christ within us by believing on Him and yet never follow after Him, His word, His precepts, His commands. Our works though good, will be works produced from our flesh(from a carnal mind, one that is not renewed by the word and living accordingly) and will not remain (John 15). We want fruit produced by the spirit which only comes from a life led by the spirit. When we have truly made Jesus the Lord of our lives not just savior, we will live lives that are changed according to the nature of Christ and this is a daily walk. Not once saved always saved, but a daily choice is made to follow after the spirit and with a heart that belongs to Christ, we wont sin and the struggle of sin is gone. (1 John 3:6) No one who lives in him keeps on sinning. No one who continues to sin has either seen him or known him).
Choose to follow after the spirit, for this life is eternal and will always remain.
(Matthew 7:16-19) 16 By their fruit you will recognize them. Do people pick grapes from thornbushes, or figs from thistles? 17 Likewise, every good tree bears good fruit, but a bad tree bears bad fruit. 18 A good tree cannot bear bad fruit, and a bad tree cannot bear good fruit. 19 Every tree that does not bear good fruit is cut down and thrown into the fire. 20Thus, by their fruit you will recognize them).
(Romans 8)1Therefore, there is now no condemnation for those who are in Christ Jesus, 2because through Christ Jesus the law of the Spirit who gives life has set you a free from the law of sin and death. 3For what the law was powerless to do because it was weakened by the flesh, b God did by sending his own Son in the likeness of sinful flesh to be a sin offering. c And so he condemned sin in the flesh, 4in order that the righteous requirement of the law might be fully met in us, who do not live according to the flesh but according to the Spirit.
5Those who live according to the flesh have their minds set on what the flesh desires; but those who live in accordance with the Spirit have their minds set on what the Spirit desires. 6The mind governed by the flesh is death, but the mind governed by the Spirit is life and peace. 7The mind governed by the flesh is hostile to God; it does not submit to God’s law, nor can it do so. 8Those who are in the realm of the flesh cannot please God.
9You, however, are not in the realm of the flesh but are in the realm of the Spirit, if indeed the Spirit of God lives in you. And if anyone does not have the Spirit of Christ, they do not belong to Christ. 10But if Christ is in you, then even though your body is subject to death because of sin, the Spirit gives life d because of righteousness. 11And if the Spirit of him who raised Jesus from the dead is living in you, he who raised Christ from the dead will also give life to your mortal bodies because of e his Spirit who lives in you.
12Therefore, brothers and sisters, we have an obligation—but it is not to the flesh, to live according to it. 13For if you live according to the flesh, you will die; but if by the Spirit you put to death the misdeeds of the body, you will live.
14For those who are led by the Spirit of God are the children of God. 15The Spirit you received does not make you slaves, so that you live in fear again; rather, the Spirit you received brought about your adoption to sonship. f And by him we cry, “Abba, g Father.” 16The Spirit himself testifies with our spirit that we are God’s children. 17Now if we are children, then we are heirs—heirs of God and co-heirs with Christ, if indeed we share in his sufferings in order that we may also share in his glory.
(Galatians 13-26) 13You, my brothers and sisters, were called to be free. But do not use your freedom to indulge the flesh a ; rather, serve one another humbly in love. 14For the entire law is fulfilled in keeping this one command: “Love your neighbor as yourself.” b 15If you bite and devour each other, watch out or you will be destroyed by each other.
16So I say, walk by the Spirit, and you will not gratify the desires of the flesh. 17For the flesh desires what is contrary to the Spirit, and the Spirit what is contrary to the flesh. They are in conflict with each other, so that you are not to do whatever c you want. 18But if you are led by the Spirit, you are not under the law.
19The acts of the flesh are obvious: sexual immorality, impurity and debauchery; 20idolatry and witchcraft; hatred, discord, jealousy, fits of rage, selfish ambition, dissensions, factions 21and envy; drunkenness, orgies, and the like. I warn you, as I did before, that those who live like this will not inherit the kingdom of God.
22But the fruit of the Spirit is love, joy, peace, forbearance, kindness, goodness, faithfulness, 23gentleness and self-control. Against such things there is no law. 24Those who belong to Christ Jesus have crucified the flesh with its passions and desires. 25Since we live by the Spirit, let us keep in step with the Spirit. 26Let us not become conceited, provoking and envying each other.