For after the subject is removed or the eye shut, we still retain an image of the things seen, though more obscure than when we see it...Imagination, therefore, is nothing more than decaying sense.

The source of every crime, is some defect of the understanding; or some error in reasoning; or some sudden force of the passions. Defect in the understanding is ignorance; in reasoning, erroneous opinion.

[Necessity is] the sum of all things, which being now existent, conduce and concur to the production of that action hereafter, whereof if any one thing now were wanting, the effect could not be produced. This concourse of causes, whereof every one is determined to be such as it is by a like concourse of former causes, may well be called (in respect they were all set and ordered by the eternal causes of all things, God Almighty) the decree of God.

Prudence is but experience, which equal time equally bestows on all men in those things they equally apply themselves unto.

The end of knowledge is power ... the scope of all speculation is the performing of some action or thing to be done.

That a man be willing, when others are so too, as far forth as for peace and defense of himself he shall think it necessary, to lay down this right to all things; and be contented with so much liberty against other men, as he would allow other men against himself.

The cause of Sense, is the External Body, or Object, which presseth the organ proper to each Sense, either immediately, as in theTaste and Touch; or mediately, as in Seeing, Hearing, and Smelling: which pressure, by the mediation of Nerves, and other strings, and membranes of the body, continued inwards to the Brain, and Heart, causeth there a resistance, or counter- pressure, or endeavor of the heart, to deliver it self: which endeavor because Outward, seemeth to be some matter without.