For it must needs be, that there is an opposition in all things. If not so, my firstborn in the wilderness, righteousness could not be brought to pass, neither wickedness, neither holiness nor misery, neither good nor bad. Wherefore, all things must needs be a compound in one; wherefore, if it should be one body it must needs remain as dead, having no life neither death, nor corruption nor incorruption, happiness nor misery, neither sense nor insensibility.

COMMENTARY

For it must needs be, that there is an opposition in all things
Life without contrast would be meaningless. If there were not two separate states then one would not require any action to reach the desired state, they would already be there. If there were two separate states, but no medium of resistance between them, then one would not require any effort to reach the desired state, they would transition freely.
Doing good would be meaningless, if good was the only option. Doing good would also meaningless, if evil existed, but there was no temptation to perform it. We call someone’s actions good because of how they overcome the opposition to do that good.

Having no life neither death, nor corruption nor incorruption, happiness nor misery, neither sense nor insensibility
Adam and Eve may have had the perfect paradise in Eden, but could they possibly have realized such? Could they be grateful for health and comfort having never experienced sickness or pain? Could they be happy having never felt sorrowful? Was giving birth to children even an option when there wasn’t a possibility for death at the other end of the spectrum?
God does want us to be innocent, but can we say He wants us to be ignorant?
In the Garden of Eden everything was clean, but it meant nothing because filthiness wasn’t an option. Again, if all God wanted was cleanliness, all He had to do was not plant a Tree of Knowledge of Good and Evil. But He did, and through that filthiness entered the world, and now being restored to cleanliness requires a difficult path of repentance on our part and the sacrifice of God’s Son. Wouldn’t this suggest that the difficult path was His intention for us? That the value is in the struggle?