What are the wonders of the Lord? They are those that we can contemplate day by day, they are feats of the Lord so that we see His perfect works manifested in our lives.
Seeing His wonders, we rejoice in Almighty God, why do we rejoice in the Lord? Because we see how beautiful it is to contemplate His mighty wonders.
When we see the heavens and the earth, we see these works and wonders created with His powerful hand, and this dresses us with joy to see His wonderful and powerful hand working on our behalf.