The curse of blood is fascinating to me in that this is the first curse meted out upon the Egyptians. Had they repented at the blood spread over the land, most certainly that blood would have been a blessing, for the blood of Christ, which this blood must symbolize is sufficient to cover the entire world and all its sin.
For God was pleased to have all his fullness dwell in him, and through him to reconcile to himself all things, whether things on earth or things in heaven, by making peace through his blood, shed on the cross. (Col. 1:19-20)
Unfortunately, instead of accepting this blood and repenting, the Egyptians and their leaders became hardened and rejected it and dug into the ground in search of their own water.
Whoever believes in the Son has eternal life, but whoever rejects the Son will not see life, for God’s wrath remains on him.” (John 3:36)
While this water quenched their thirst, it was not capable of staving off the judgment to come. The water of life brought by the death of Christ and applied to each person by repentance is the only thing that can stave off judgment. When the Egyptians rejected the lesson of blood, they opened themselves up to the further judgment of God. And such is still the case for all who reject the blood of Christ and whose names are not found written in the book of life. For those who dig elsewhere and repudiate the son, only the further wrath of God remains as can be seen in the remaining plagues upon the land. But for those who repent at the first outpouring of blood and accept the judgment of sin in Christ, there is life eternal and no longer any fear of judgment.
There is a judge for the one who rejects me and does not accept my words; that very word which I spoke will condemn him at the last day. (John 12:48)
There is no fear in love. But perfect love drives out fear, because fear has to do with punishment. The one who fears is not made perfect in love. (1John 4:18)