Newton's amazing rules of reasoning

1. We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances. (cf Occum's Razor)
2. Therefore to the same natural effects we must, as far as possible, assign the same causes.
3. The qualities of bodies are to be esteemed the universal qualities of all bodies whatsoever. (leading him to conceive of some indivisible particle that makes up everything, or maybe there isn't one, but all bodies follow the laws of gravity)
4. In experimental philosophy we are to look upon propositions collected by general inductions from phenomena as accurately or very nearly true, notwithstanding any contrary hypotheses that may be imagined. (objective science, but no hypotheses formed in science? Plain observation and deduction?)

"This most beautiful system of the sun, the planets, and comets could only proceed from the counsel and dominion of an intelligent and powerful Being"