Having identified the elect as being humble as are little children, Jesus said you will not enter the kingdom of heaven unless you change and are like little children; i.e., humble.
Indeed. . .all those of Adam are born condemned unbelievers,
as the result of Adam's sin imputed to them at birth (Ro 5:17), and which is the pattern (Ro 5:14)
for Christ's righteousness imputed to all those of Christ (Ro 5:18-19, 1:17, 3:21, 4:5, 13, 9:30, 10:6, Gal 3:16, Php 3:9).
"God is the Savior of all men". . .who preserves and prospers them in the natural order, and has put them in a state where they can be saved, rather than a fixed state, as is Satan and the fallen angels.
It's not about an infant hardening himself.
It's about Adam's sin being imputed to all those of Adam (Ro 5:17, 12-16, 18-19) as the pattern (Ro 5:14) for Christ's righteousness being imputed to all those of Christ (Ro 5:18-19, 1:17, 3:21, 4:5, 13, 9:30, 10:6, Gal 3:16, Php 3:9).
That imputation of Aam's sin condemns all mankind at birth, making them by nature objects of wrath (Eph 2:3), whose only remedy is faith in Jesus Christ (Jn 3:18, Eph 2:8-9).
God has shut up all men in sin so that all salvation is only by his mercy (Ro 11:32) through faith (Jn 3:18, Eph 2:8-9).
I have read through your quotes. It is not correct to judge that infants and children are humble. Some of them have strong self esteem. "I am a king."
Infants have not hardened themselves, and haven't had much chance as from your quotes, to "lust"... It is far fetched to say a deceased infant is condemned. As from your quotes, they physically die but I say spiritually, they live. They have the soft hearts and trust, and God welcomes them, as from my quotes from Jesus' Gospel. This salvation is applied also to adults that Paul mentioned in Timothy.
Rome was a most wicked place! To be a Roman man in that culture was to sin. It was very hard for Roman Christians, some Romans were lost by their adult culture, being better off dying when still small. But even the worst of the worst, Jesus asked God the Father not to condemn the men who were crucifying him, for they did not know what they were doing.
God controls the afterlife by His mighty arm and angels. Some of the unbelievers are saved. 1 Timothy 4:10. But more of them could be if they had faith in Jesus. And
trusted like little children.
Childlike trust, is part of good faith.
1 Timothy 4:6-12. In Part, NLT
6If you explain these things to the brothers and sisters,
c Timothy, you will be a worthy servant of Christ Jesus, one who is nourished by the message of faith and the good teaching you have followed.
7Do not waste time arguing over godless ideas and old wives’ tales. Instead, train yourself to be godly.
8“Physical training is good, but training for godliness is much better, promising benefits in this life and in the life to come.”
9This is a trustworthy saying, and everyone should accept it.
10This is why we work hard and continue to struggle,
d for our hope is in the living God, who is the Savior of all people and particularly of all believers.
11Teach these things and insist that everyone learn them.
12Don’t let anyone think less of you because you are young.