A confusion...

In Exodus 14:8 it says,

   ⁸And the LORD hardened the heart of Pharaoh king of Egypt, and he pursued after the children of Israel: and the children of Israel went out with an high hand.

Why would God harden the heart of a person??

The closest answer I could  get was, Sirach 15: 11-13

11

Say not: "It was God's doing that I fell away"; for what he hates he does not do.

12

Say not: "It was he who set me astray"; for he has no need of wicked man.

13

Abominable wickedness the LORD hates, he does not let it befall those who fear him.