And the LORD said to Moses, “… And I on My part shall harden Pharaoh’s heart.” There are different explanations for why God hardened Pharaoh’s heart. Sforno suggests that God wishes human beings to do the right thing because it is right and not because it is expedient or convenient; therefore He hardened Pharaoh’s heart. This way if Pharaoh would repent, his repentance would be sincere. Ultimately God leads us all to repentance but the wise person does not wait to act out of fear and with a hardened heart.