Action may be regarded as a kind of middle term between mind and matter; it is the throe of thought and thing, the quivering clash and union of body and soul; commonplace enough in practice; miraculous, as violating every canon on which thought and reason are founded, if we theorise about it, put it under the microscope, and vivisect it.
"Luck or Cunning?"
Samuel Butler
Study mechanics, my boy, a little more than you have yet done, before venturing on further inventions, and don't theorise too much.
"In the Track of the Troops"
R.M. Ballantyne
The thinker also who takes upon himself to theorise in a manner apart from any considerable section of humanity, is no less bound to entertain a fitting respect for the notions, even to the mistaken notions, with which that section is animated.
"A Cursory History of Swearing"
Julian Sharman