You see the finger of God represents power and the magicians could only stand back in awe when they saw God’s mighty power. However, we learn in Exodus 8, that Pharaoh’s hard heart remained untouched and he did not agree with his wise men. Try to imagine the difference it is going to make to the Egyptians as well as to God’s people when they see the Israelites were exempt from many of the plagues. The Israelites escaped the dread of the plague of flies, livestock, boils, hail, locusts, darkness and the granddaddy of all the plague of the firstborn.
The finger of God symbolizes God’s power to judge us and to judge is God’s right. No man is able to stand against God’s finger. Although, I would have you notice the same finger that represents God’s power to judge, is the same finger that represents His power to save!