Luther's 1520 treatise "To the Christian Nobility" is the Reformation's central document arguing for priesthood of all believers. Here's the first sentence:
The time for silence is past, and the time to speak has come.
On the next page Luther writes:
I beg you, give my apologies to those who are moderately intelligent, for I do not know how to earn the grace and favor of the superintelligent. I have often sought to do so with the greatest pains, but from now on I neither desire nor value their favor. God help us to seek not our own glory but his alone. Amen.
--Luther's Works, 44:123-24