This is part three in a three part series; click here to go to part one.
The reasoning behind why God would never again curse the ground on account of man is this: for the intent of man's heart is evil from his youth. But is this really a good reason not to curse the earth again? Did not God send the flood upon the earth because of man's continual wickedness? Why then is man's wickedness given as the reason to not curse the earth again?
No matter how much more God cursed the earth, men would still be wicked from birth. And so, rather than increase the curse, He chose to show mercy to fallen man by leaving things unaltered. Rather than making the curse upon the ground even harsher, God chose to patiently endure fallen, hellbound men (Romans 9:22). But why? For what reason? For what end? In order that He might make known His mercy to those He chose before the foundation of the world (Ephesians 1:4, also see Romans 9:23).
The bottom line is this: God has the freedom to demonstrate His mercy whenever (and for whatever reason) He wants. God has created everything for its own purpose, even the wicked for the day of evil (Proverbs 16:4). It is by His mercy alone that any person is saved. It is by His mercy that the curse on the ground is not a billion times worse. It is by His mercy that any person escapes the flames of hell.
A new era began after the flood, and in that era, God began to reveal more and more of Himself to fallen man. He began to make covenants with man, something He did not do in the pre-flood world. Shortly after the flood, God made a covenant with Noah. Eventually, He made one with Abraham. He then spoke through Moses and David, and through the prophets: Isaiah, Jeremiah, Ezekiel... all of it leading up to the ultimate revelation: Jesus Christ, our Saviour of infinite worth— who bears the curse of the law for us!
Noah's Name: Its Meaning and Significance - Genesis 5:29
State of the World (3130 BC): Noah's Father (Lamech) Is Born - Genesis 5:25
The Lord Smelled The Soothing Aroma - Genesis 8:21
The Fall: Merciful Curses - The Christian Worldview