To answer the difference between the interpretation of the Bible from a child in Christ, compared to a man in Christ, we must first acknowledge that the Bible adheres to two forms of wisdom, heavenly and devilish. Both kinds of wisdom can come from studying scripture. The first comes from studying with faith and submission, the second comes from study not mixed with faith:
13 Who is wise and understanding among you? Let them show it by their good life, by deeds done in the humility that comes from wisdom. 14 But if you harbor bitter envy and selfish ambition in your hearts, do not boast about it or deny the truth. 15 Such “wisdom” does not come down from heaven but is earthly, unspiritual, demonic. 16 For where you have envy and selfish ambition, there you find disorder and every evil practice.
17 But the wisdom that comes from heaven is first of all pure; then peace- loving, considerate, submissive, full of mercy and good fruit, impartial and sincere. 18 Peacemakers who sow in peace reap a harvest of righteousness. (James 3:13-18)
From this we see that doctrine is not just intellectual but spiritual. In fact the first thing to do to attain wisdom is not to go to Bible College (although that is good to do) but to pray for wisdom.
I keep asking that the God of our Lord Jesus Christ, the glorious Father, may give you the Spirit of wisdom and revelation, so that you may know him better. (Ephesians 1:17)
If any of you lacks wisdom, you should ask God, who gives generously to all without finding fault, and it will be given to you. (James 1:5)
Therefore, when we realize wisdom does not come primarily from study and learning but by God, through His Spirit, we can appreciate that faith is a kind of knowledge, and without it, the Scripture will become meaningless to its reader.
18 For the message of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God. (1 Corinthians 1:18)
What this means to a believer is that obedience to faith in Christ will provide more wisdom than study. In fact, a person may seek God through His word, obey Him for many years, and attain great wisdom in love and the fruits of the Spirit, then lose most of it through sin. Just as Samson eventually lost His strength through constant neglect, so we can lose the knowledge we have. Yet Samson (was) renewed in strength again.
So how does this affect 'How we interpret the Bible?' How does our level of spiritual growth, or strength, affect our interpretation?
First, when we habitually sin, we lose sight of God's grace in Christ. We no longer believe it the way we did, no matter what we say to ourselves. Second, the basic things, the milk of God's Word becomes the only thing that remains sensible to us. We think about what we have done, how we ought to live, How we have been faithful, how we have failed. We no longer have faith to rest our eyes upon God and what He has done. Our focus turns inward in weakness, rather than Godward in joy.
Therefore, the child looking at the Bible can only see the rules, what he can do, what he cannot do. The child worries about how he might be punished, and how to avoid it. The adult can only see Christ, what He has done, how glorious He is. The adult will believe and give His life over to God for that great love, which has been made known to Him in Christ's dying love. The child will judge others, become puffed up through an appearance of wisdom, will argue motivated by jealousy. A child will be envious of the adults' freedom through their faith.
From these different perspectives, the child will rarely see the same things from the Scripture that the adult sees. Children are fascinated by novelties; the adult is absorbed in realities. The child will question if their parents in Christ understand anything. They will easily follow new theological trends and discount godly men from the past, as being irrelevant to our world today. Yet most children will eventually grow into adults and realize:
What has been will be again, what has been done will be done again; there is nothing new under the sun.(Ecclesiastes 1:9)
The adult will see nothing but Christ in everything, and all else will be considered folly and shame. This will affect his interpretation of every Scripture, from every angle. This can't be explained under a technical theory of exegesis; it is spiritual.
This is what we speak, not in words taught us by human wisdom but in words taught by the Spirit, explaining spiritual realities with Spirit- taught words. 14 The person without the Spirit does not accept the things that come from the Spirit of God but considers them foolishness, and cannot understand them because they are discerned only through the Spirit. (1 Corinthians 2:13-14)