“When I raise my powerful hand and bring out the Israelites, the Egyptians will know that I am the Lord.”
Exodus 7:5 (NLT)

Then the Lord said to Moses, “Get up early in the morning and stand before Pharaoh. Tell him, ‘This is what the Lord, the God of the Hebrews, says: Let my people go, so they can worship me.'
Exodus 9:13 (NLT)

"If you don’t, I will send more plagues on you and your officials and your people. Then you will know that there is no one like me in all the earth.  By now I could have lifted my hand and struck you and your people with a plague to wipe you off the face of the earth.  But I have spared you for a purpose—to show you my power and to spread my fame throughout the earth."
Exodus 9:14-16 (NLT)

They answered, “Your servants have come from a very distant country. We have heard of the might of the Lord your God and of all he did in Egypt.”
Joshua 9:9 (NLT)

“This is a disaster! We have never had to face anything like this before! Help! Who can save us from these mighty gods of Israel? They are the same gods who destroyed the Egyptians with plagues when Israel was in the wilderness.”
1 Samuel 4:7-8 (NLT)

“When Pharaoh saw that the rain and hail and thunder had stopped, he sinned again: He and his officials hardened their hearts. So Pharaoh’s heart was hard and he would not let the Israelites go, just as the Lord had said through Moses.”
Exodus 9:34-35 (NIV)

THE ANSWER TO OUR ‘WHY’ WILL BE DISCOVERED IN WORSHIP OF GOD.

“Here is the end of the matter: God is the one being in the universe for whom self-exaltation is not the act of a needy ego, but an act of infinite giving. The reason God seeks our praise is not because he won’t be fully God until he gets it, but that we won’t be happy until we give it. This is not arrogance. This is grace. This is not egomania. This is love.”
John Piper