how all of creation declares how great God is 

Psalm 19:1 says "The heavens declare the glory of God and the sky above proclaims his handiwork" and Romans 1:20 states that God's "invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made." In other words, we are completely surrounded by "Silent Witnesses" of who God is - the created world, humans and history all testify to God's character. Every person has been given the capacity to inquire, study and learn from the created world, which means we can know God better through the study of creation. Being a faithful student of any field of inquiry (i.e., science, math, art, behavioral science) gives us a closer glimpse to the Creator of the universe.