Then the Lord said to Moses, “Go to Pharaoh, for I have hardened his heart and the heart of his servants [making them determined and unresponsive], so that I may exhibit My signs [of divine power] [a]among them, and that you may recount and explain in the hearing of your son, and your grandson, what I have done [repeatedly] to make a mockery of the Egyptians—My signs [of divine power] which I have done among them—so that you may know [without any doubt] and recognize [clearly] that I am the Lord.” Exodus 10:1-2
Miracles manifest God’s presence. Acts reveal character. The Bible, which has the fullest revelations of God, is a record of His acts. God revealed to the Israelites His power and faithfulness. He asserted His supremacy over all false deities, His power over nature and ability to protect his chosen people, and His truth in “remembering His covenant” with their ancestors. He revealed himself more fully through Christ – the fullest revelation of the true God.
This passage reminds us of God’s judgement as a strong motivation for evangelism. The Holy Spirit convicts men of sin, righteousness, and judgment (John 16:8), bringing the sinner to faith in Christ. It is also an awareness of the coming judgment of God which motivates the Christian to evangelize (2 Cor. 5:11) and to live pure and holy lives until He comes (2 Pet. 3:11-12).
For, wherever we see any sign of the glory of God, piety awakens this feeling of admiration in our hearts. In the meantime, however, since we are too prone to superstition, these two errors must be avoided; lest, in our gross imaginations, we should, as it were, draw down God from heaven, and affix him to places on earth; and, also, lest we should account that sanctity perpetual which is only temporary. The remedy of the first evil is to reflect on the nature of God; of the second, to observe his design, how far, and for what use he sanctifies places. For since the nature of God is spiritual, it is not allowable to imagine respecting him anything earthly or gross; nor does his immensity permit of his being confined to place. – John Calvin Commentary
The Egyptians and Israelites saw Your mighty works in the terrifying Egyptian plagues. Some of the people came to know You through those mighty works of judgment and redemption and others, like the Egyptian Pharaoh, hardened their hearts with pride and refused to acknowledge You as the one true God. Cleanse us, Lord, of the sin of a prideful and self-sufficient spirit so that we can turn to You as Jesus taught us, yielding ourselves in poverty of spirit and acknowledging that we need You to guide our lives on our journey to salvation. We pray in the name of God the Father, the Son, and the Holy Spirit. Amen