Physics, beware of metaphysics.

What the Latins have done in this text (1 John v, 7) the Greeks have done to Paul (1 Tim. iii, 16). They now read, "Great is the mystery of godliness; God manifest in the flesh"; whereas all the churches for the first four or five hundred years, and the authors of all the ancient versions, Jerome as well as the rest, read, "Great is the mystery of godliness, which was manifest in the flesh." Our English version makes it yet a little stronger. It reads, "Great is the mystery of godliness: God was manifest in the flesh."

The instinct of brutes and insects can be the effect of nothing else than the wisdom and skill of a powerful ever-living agent.

...from the same principles, I now demonstrate the frame of the System of the World.

To me there has never been a higher source of earthly honor or distinction than that connected with advances in science.

The Ignis Fatuus is a vapor shining without heat.

The best and safest way of philosophising seems to be, first to enquire diligently into the properties of things, and to establish those properties by experiences [experiments] and then to proceed slowly to hypotheses for the explanation of them. For hypotheses should be employed only in explaining the properties of things, but not assumed in determining them; unless so far as they may furnish experiments.