As the bodies that surround us do diversely affect our organs, the mind is forced to receive the impressions
 John Locke, An Essay Concerning Human Understanding (1689). copy citation

Context

“These simple ideas, when offered to the mind, the understanding can no more refuse to have, nor alter when they are imprinted, nor blot them out and make new ones itself, than a mirror can refuse, alter, or obliterate the images or ideas which the objects set before it do therein produce. As the bodies that surround us do diversely affect our organs, the mind is forced to receive the impressions; and cannot avoid the perception of those ideas that are annexed to them. CHAPTER II.—OF SIMPLE IDEAS. 1. Uncompounded Appearances. The better to understand the nature, manner, and extent of our knowledge, one thing is carefully to be observed concerning the ideas we have;” source