We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.Isaac Newton
Hypotheses should be subservient only in explaining the properties of things but not assumed in determining them, unless so far as they may furnish experiments.Isaac Newton
In the beginning of the year 1665, I found the method of approximating series and the rule for reducing any dignity of any binomial into such a series.Isaac Newton
The description of right lines and circles, upon which geometry is founded, belongs to mechanics. Geometry does not teach us to draw these lines, but requires them to be drawn.Isaac Newton
The same thing is to be understood of all bodies, revolved in any orbits. They all endeavour to recede from the centres of their orbits, and were it not for the opposition of a contrary force which restrains them to and detains them in their orbits, which I therefore call Centripetal, would fly off in right lines with a uniform motion.Isaac Newton
The same law takes place in a system, consisting of many bodies, as in one single body, with regard to their persevering in their state of motion or of rest. For the progressive motion, whether of one single body or of a whole system of bodies, is always to be estimated from the motion of the center of gravity.Isaac Newton
That the divided but contiguous particles of bodies may be separated from one another is a matter of observation; and, in the particles that remain undivided, our minds are able to distinguish yet lesser parts, as is mathematically demonstrated.Isaac Newton
The proper method for inquiring after the properties of things is to deduce them from experiments.Isaac Newton
