infant is born with a fallen nature/seperated from God given the transgression of Adam.
1 cor 15:22 For as in Adam all die, even so in Christ shall all be made alive.
Rom 5:18 Therefore as by the offence of one judgment came upon all men to condemnation; even so by the righteousness of one the free gift came upon all men unto justification of life
Adam and Eve were kicked out of eden.Gen 3:23
must be born again to enter kingdom of God
john 3:3 Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.4 Nicodemus saith unto him, How can a man be born when he is old? can he enter the second time into his mother’s womb, and be born? 5 Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God.
infants are just right candidates (no personal sin) , being born again they overcome the separation from God caused by adam.
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luke 18:15and they brought unto him also infants*, that he would touch them: but when his disciples saw it, they rebuked them. 16 But Jesus called them unto him, and said, Suffer little children to come unto me, and forbid them not: for of such is the kingdom of God.
baptism of infant is parents cooperation with grace in faith, just as the parents of the infants on the night of passover.
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