If a man will begin with certainties, he shall end in doubts, but if he will content to begin with doubts, he shall end in certainties.

There was never miracle wrought by God to convert an atheist, because the light of nature might have led him to confess a God.

All will come out in the washing.

Medicine is a science which hath been (as we have said) more professed than laboured, and yet more laboured than advanced: the labour having been, in my judgment, rather in circle than in progression. For I find much iteration, but small addition. It considereth causes of diseases, with the occasions or impulsions; the diseases themselves, with the accidents; and the cures, with the preservation.

The first question concerning the Celestial Bodies is whether there be a system, that is whether the world or universe compose together one globe, with a center, or whether the particular globes of earth and stars be scattered dispersedly, each on its own roots, without any system or common center.

Journeys at youth are part of the education; but at maturity, are part of the experience.

Again there is another great and powerful cause why the sciences have made but little progress; which is this. It is not possible to run a course aright when the goal itself has not been rightly placed.