The inspired and expired air may be sometimes very useful, by condensing and cooling the blood that passeth through the lungs; I hold that the depuration of the blood in that passage, is not only one of the ordinary, but one of the principal uses of respiration.
Robert BoyleAs the sun is best seen at his rising and setting, so men's native dispositions are clearest seen when they are children, and when they are dying.
Robert BoyleAs the moon, though darkened with spots, gives us a much greater light than the stars that sewn all-luminous, so do the Scriptures afford more light than the brightest human authors. In them the ignorant may learn all requisite knowledge, and the most knowing may learn to discern their ignorance.
Robert BoyleAnd, to prevent mistakes, I must advertize you, that I now mean by elements, as those chymists that speak plainest do by their principles, certain primitive or simple, or perfectly unmingled bodies; which not being made of any other bodies, or of one another, are the ingredients of which all those called perfectly mixt bodies are immediately compounded, and into which they are ultimately resolved: now whether there be any such body to be constantly met with in all, and each, of those that are said to be elemented bodies, is the thing I now question.
Robert Boyle