From a knowledge of His work, we shall know Him.

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.

As 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.

Well, I see I am not designed to the finding out the Philosophers Stone, I have been so unlucky in my first attempts in chemistry.

He whose faith never doubted, may justly doubt of his faith.

... even when we find not what we seek, we find something as well worth seeking as what we missed.

In an arch each single stone which, if severed from the rest, would be perhaps defenceless is sufficiently secured by the solidity and entireness of the whole fabric, of which it is a part.