Who would not think, seeing us compose all things of mind and body, but that this mixture would be quite intelligible to us? Yet it is the very thing we least understand. Man is to himself the most wonderful object in nature; for he cannot conceive what the body is, still less what the mind is, and least of all how a body should be united to a mind. This is the consummation of his difficulties, and yet it is his very being. Modus quo corporibus adhærent spiritus comprehendi ab hominibus non potest, et hoc tamen homo est.

[Pascal Thoughts 72]