The long chains of simple and easy reasonings by means of which geometers are accustomed to reach the conclusions of their most difficult demonstrations, had led me to imagine that all things, to the knowledge of which man is competent, are mutually connected in the same way, and that there is nothing so far removed from us as to be beyond our reach, or so hidden that we cannot discover it, provided only we abstain from accepting the false for the true, and always preserve in our thoughts the order necessary for the deduction of one truth from another.

The last rule was to make enumerations so complete, and reviews so comprehensive, that I should be certain of omitting nothing.

Each problem that I solved became a rule, which served afterwards to solve other problems.

Divide each difficulty into as many parts as is feasible and necessary to resolve it.

:Science is the knowledge of Consequences, and dependence of one fact upon another:

When we run over libraries, persuaded of these principles, what havoc must we make? If we take in our hand any volume; of divinity or school metaphysics, for i…

Logic, n. The art of thinking and reasoning in strict accordance with the limitations and incapacities of the human misunderstanding.