Quotes by Sir Isaac Newton

There may be more attractive powers than gravity, magnetism and electricity in Nature

For it is well known that bodies act upon one another by the attraction of gravity, magnetism, and electricity; and these instances show the tenour and course of Nature and make it not improbable that there may be more attractive powers than these. For Nature is very consonant and comfortable to herself.

Does the ether not easily penetrate all bodies, being rarer and subtler than air, and exceedingly more elastic and more active?

Is not ether infinitely more rare and more subtle than air, and exceedingly more elastic and more active? Does it not easily penetrate all bodies? And is it not by its elastic force diffused through the universe?