“It is not the mark of a Christian mind to take no delight in assertions. On the contrary, a man must delight in assertions or he will be no Christian.
And by assertion— in order that we may not be misled by words– I mean a constant adhering, affirming, confessing, maintaining, and an invincible persevering. Nor, I think, does the word mean anything else either as used by the Latins or by us in our time.
I am speaking, moreover, about the assertion of those things which have been divinely transmitted to us in the sacred writings… Nothing is better known or more common among Christians than assertion. Take away assertions and you take away Christianity.”
–Martin Luther, The Bondage of the Will, in Luther and Erasmus: Free Will and Salvation, Eds. E. Gordon Rupp and Philip Watson (Philadelphia: Westminster Press, 1969), 105-106.