That though we are certain of many things, yet that Certainty is no absolute Infallibility, there still remains the possibility of our being mistaken in all matters of humane Belief and Inquiry.

In these matters the only certainty is that there is nothing certain.

Inquiry is fatal to certainty

At the core of all well-founded belief lies belief that is unfounded.

There is not anything I know which hath done more mischief to Religion... than the disparaging of Reason, under pretense of respect and favour to it. For hereby the very Foundations of Christian Faith have been undermined, and the World prepared for Atheism. And if Reason must not be beard, the Being of a God, and the Authority of Scripture, can neither be proved nor defended; and so our Faith drops to the Ground like a House that hath no Foundation.

The union of a sect within itself is a pitiful charity; it's no concord of Christians, but a conspiracy against Christ; and they that love one another for their opinionative concurrence, love for their own sakes, not their Lord's.