Every child start life on milk from the mothers breast and then graduate to formulas. Gradually the child is weaned from milk, both mothers milk and formulas and started on light solids, peas, fruits, fish, until gradually the child is grown enough to eat every kind of food.
So is with us as Christians, we start up after salvation with forsaking our old ways of living. We embrace righteousness through Christ and drop of unholy living, lying, being troublesome, sexual immorality, murder, and all kinds of evil. We are weaned off such way of living at our conversion. We however must not remain there. We need to grow, feeding our spirit man with the word of God as the Holy Spirit help us.
To get us to be transformed Christ gave gifts unto some from amongst us to help feed us with depth of insight revealed from The Word so we can mature in our knowledge of God and what Christ Jesus attained for us
Ephesians 4:11 So Christ himself gave the apostles, the prophets, the evangelists, the pastors and teachers, 12 to equip his people for works of service, so that the body of Christ may be built up 13 until we all reach unity in the faith and in the knowledge of the Son of God and become mature, attaining to the whole measure of the fullness of Christ.
14 Then we will no longer be infants, tossed back and forth by the waves, and blown here and there by every wind of teaching and by the cunning and craftiness of people in their deceitful scheming.
We however, must be careful of what we are being fed. As a child, when an infant or toddlers are fed something they do not like, the child will vomit such, spit it out, reject it, even though they cannot speak, signalling to the adult that I don’t want this. So also as born again and spirit filled individuals, we must be able to spit out teachings that are contrary to Christ. Most do not know falsehood from the pulpit because they have not been reading their Bible. Many are fed false narratives not in the Scriptures.
To build your spirit man up, you must take time to read your Bible with the help of the Holy Spirit. It is the Holy Spirit that gives understanding of what you are reading. You must learn to discern truth from falsehood or else you will be tossed here and there.
While men slept, friends, the enemy has sown weeds amongst the good seed of God. The gifts Christ gave to many have been polluted by greed, disobedience, pride, and the love of mammon. We must pray for sight to see.