It was prettily devised of Aesop, The fly sat on the axle tree of the chariot wheel and said, what dust do I raise!

A sudden bold and unexpected question doth many times surprise a man and lay him open.

I have to hope that my instincts will do the right thing, because I can't erase what I have done. And if I drew something first, then my paintings would be illustrations of drawings.

Medicine is a science which hath been (as we have said) more professed than laboured, and yet more laboured than advanced: the labour having been, in my judgment, rather in circle than in progression. For I find much iteration, but small addition. It considereth causes of diseases, with the occasions or impulsions; the diseases themselves, with the accidents; and the cures, with the preservation.

No one has yet been found so firm of mind and purpose as resolutely to compel himself to sweep away all theories and common notions, and to apply the understanding, thus made fair and even, to a fresh examination of particulars. Thus it happens that human knowledge, as we have it, is a mere medley and ill-digested mass, made up of much credulity and much accident, and also of the childish notions which we at first imbibed.

The human understanding is like a false mirror, which, receiving rays irregularly, distorts and discolors the nature of things by mingling its own nature with it.

Art is man added to Nature.