A theologian should be thoroughly in possession of the basis and source of faith--that is to say, the Holy Scriptures. Armed with this knowledge it was that I confounded and silenced all my adversaries; for they seek not to fathom and understand the Scriptures; they run them over negligently and drowsily; they speak, they write, they teach, according to the suggestion of their heedless imaginations.

The table talk or familiar discourse of Martin Luther, tr. by W. Hazlitt (ed. 1848)