....you agree with and participate in His design.
Birds and fish and plants reveal God's glory as they display designs He set into motion. So too can humans partake in this revealing as they show God's way of love, justice, et cetera — only there is a catch. Humans have a choice. We may choose not to do things God's way and so choose not to bear God's image.
Do humans always bear God's image? Yes, if you are human you are reflective of God, period. But there is a difference between a stuffed bird in a museum and a bird in flight. One has only the form while the other has the entire essence.
In the same way, when compared to the rest of creation, all humans seem especially similar to God, regardless of what they do or what they believe. How much more when they imitate God in all thought, word and deed.