Let’s think about it closely. What we are saying is the Holy Spirit must change a man internally before he will embrace Jesus Christ for salvation. In our sinful state, no amount of altar calls, revivals, soft piano music, or fiery preaching will persuade us to believe in Christ. You and I, alone, cannot persuade anyone to be saved. This is a work only the Spirit of God can do.
Logically, Calvin argued we must conclude that God chooses whom he will save and passes over the rest. For those chosen for salvation, God provides every means – primarily preaching and prayer – to bring them to a saving knowledge of Jesus Christ. Those God passed over he permits to remain happy in sin until the day of judgment. And, he made this choice before he created the world.
And, there is no such thing as “terrible twos.” What you observe as children grow they get better and better at demonstrating the sinfulness of their minds and hearts. No, children are not born innocent.