Created order has what we may call its brighter side. But its justification by its Creator and His self-disclosure is not bound up with this brighter side. It is not connected with the fact that the sun shines, that there are blossoms and fruits, pleasing shapes, colours and sounds, realities and groups of realities which preserve and foster life, purposeful relationships and order, intelligible and serviceable elements and powers, which enlighten the created mind of man, speak to his heart, and in some way correspond with his will for life and foster it.
This brighter side of creation is not enough to justify the creature, to render it really good. After all, we acknowledge in referring to a brighter side that there is a darker side, which might push us to exactly the opposite conclusion. But this not mean that the beauty and order of creation is meaningless. It simply means that its meaning can only be really understood, and placed on a secure foundation in our knowledge, in the light of God's revelation, the covenant brought to fulfillment in Jesus Christ:
An affirmative judgement on creation has its foundation and rightful place. The recognition of its direct and immanent goodness is demanded from the man whom the Creator in His revelation has confronted with Himself.
Note that it is really the immanent goodness of creation which is to be recognised here. The beauty and order that we see in creation really do speak of its goodness in God's sight. Creation speaks goodness in itself, and thus witnesses to God's goodness all the time; this voice, however, is only heard and heard rightly when God is known in Christ, and the covenant is known as the meaning of creation.
The joyful voice of the creature rings out where the self-revelation of God has been apprehended.
Quotes from CD III/1, 370-1.