If true religion is to beam upon us, our principle must be, that it is necessary to begin with heavenly teaching, and that it is impossible for any man to obtain even the minutest portion of right and sound doctrine without being a disciple of Scripture. Hence, the first step in true knowledge is taken, when we reverently embrace the testimony which God has been pleased therein to give of himself. For not only does faith, full and perfect faith, but all correct knowledge of God, originate in obedience. And surely in this respect God has with singular providence provided for mankind in all ages.
-- John Calvin, pg. xxviii in The Institutes