Protestant Assumptions about the Assumption

What came first, the chicken or the egg?

What came first? The doctrine? Or the practice? In my opinion, Protestants function under the premise that:
a. all doctrine is first, written down.
b. the Church issues the doctrine in some sort of edict.
c. the Catholic faithful now begin to follow this doctrine.

Although that is how God promulgated the Ten Commandments in the Old Testament. That is probably ....(Read More).