“And I am sure that the king of Egypt will not let you go, no, not by a mighty hand. And I will stretch out My hand, and smite Egypt with all My wonders which I will do in the midst thereof: and after that he will let you go. And I will give this people favour in the sight of the Egyptians: and it shall come to pass, that, when ye go, ye shall not go empty: but every woman shall borrow of her neighbour, and of her that sojourneth in her house, jewels of silver, and jewels of gold, and raiment: and ye shall put them upon your sons, and upon your daughters; and ye shall spoil the Egyptians.” Exodus 3:19-22 (KJB)
Moses has just met GOD on the mountain. The LORD has revealed Himself through a burning bush as the I AM, even I AM THAT I AM. He is not the I was; neither the I will be; but He is the I AM meaning there is no other, He needs no other, and neither does Moses need any other. Neither do you or me need any other but the I AM.
GOD was giving to Moses the promise that He would accomplish what He is calling, sending Moses to do. Moses is the instrument of God’s message. The LORD will work through Moses, and it becomes apparent later that Aaron is an instrument of the LORD too (Exodus 4:10-17).
By signs and wonders of GOD the people of Israel would be convinced that Moses was the servant of the LORD. By signs and wonders of GOD the heart of Pharaoh would be hardened until GOD would do one wonder which would temporarily turn his heart.
The children of Israel would go out free, and with the goods from the Egyptian people which would be equivalent to their wages for 400 years of captivity.
We can know that when GOD promised Israel of their deliverance from Egypt – the place of slavery to the enemy, daily drudgery, fear, pain through lashing with with whips, and living in squalor. We are in the state of slavery to sin until the Lord Jesus Christ delivers us through His death, burial, and resurrection.
When we put our faith in the finished work of Christ on His cross we are made clean, have access to GOD, and are forever free from the condemnation, guilt, and shame of sin. We also inherit all that is His (Read Ephesians 1).