"Because we maintain that in Scripture we are taught all things necessary unto salvation; hereupon very childishly it is by some demanded, what Scripture can teach us the sacred authority of the Scripture, upon the knowledge whereof our whole faith and salvation dependeth? As though there were any kind of science in the world which leadeth men into knowledge without presupposing a number of things already known. No science doth make known the first principles whereon it buildeth, but they are always either taken as plain and manifest in themselves, or as proved and granted already, some former knowledge having made them evident. Scripture teacheth all supernatural revealed truth, without the knowledge whereof salvation cannot be attained. The main principle whereupon our belief of all things therein contained dependeth, is, that the Scriptures are the oracles of God himself. This in itself we cannot say is evident. For then all men that hear it would acknowledge it in heart, as they do when they hear that "every whole is more than any part of that whole," because this in itself is evident. The other we know that all do not acknowledge when they hear it. There must be therefore some former knowledge presupposed which doth herein assure the hearts of all believers. Scripture teacheth us that saving truth which God hath discovered unto the world by revelation, and it presumeth us taught other wise that itself is divine and sacred."