I see I have made my self a slave to Philosophy.

Therefore, the causes assigned to natural effects of the same kind must be, so far as possible, the same.

The qualities of bodies, which admit neither intension nor remission of degrees, and which are found to belong to fill bodies within the reach of our experiments, are to be esteemed the universal qualities of all bodies whatsoever.

Do not great Bodies conserve their heat the longest, their parts heating one another, and may not great dense and fix'd Bodies, when heated beyond a certain degree, emit Light so copiously, as by the Emission and Re-action of its Light, and the Reflexions and Refractions of its Rays within its Pores to grow still hotter, till it comes to a certain period of heat, such as is that of the Sun?

When two forces unite, their efficiency double.

Whence arises all that order and beauty we see in the world?

Physics, beware of metaphysics.