[ConservativeMind]

So, all people who don’t follow God had their hearts hardened to make sure they wouldn’t follow God?

[Theophilus]

We are responsible for our own hearts but we also owe every aspect of our existence to God who created and sustains us. Our rebellions never frustrate His almighty irrevocable purposes. Everything God does is sure to begin with. He doesn't have to "make sure" about anything. Every quantum particle in the Universe moves in it's most infinitesimal fragment of time to his perfectly exquisite orchestration.

Isaiah 63:17
O Lord, why hast thou made us to err from thy ways, and hardened our heart from thy fear? Return for thy servants' sake, the tribes of thine inheritance.

John 6:44
44 No man can come to me, except the Father which hath sent me draw him: and I will raise him up at the last day.

Romans 9:18
Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth.

Romans 8:28
And we know that all things work together for good to them that love God, to them who are the called according to his purpose.