I love this from Scott Oliphint:
Even before the entrance of sin, God condescended, in His Son, to speak to Adam and Eve, and to walk in the Garden. This condescension of God, in the person of His Son, was a constant pledge of the relationship to man, the covenant, that God had unilaterally established.
But then the sin of man ruined everything. Left to itself, the world would be a place where it was “always winter.” Yet the LORD God refused to let creation languish. Even with the devastating effects of sin, this now man-mangled habitat would not be “always winter.” In His grace, the Lord determined, according to His own redemptive time-table, to fight against and conquer the sin that we brought upon ourselves and on the rest of His creation.