"To every action there is always opposed an equal reaction."

"The changing of bodies into light, and light into bodies, is very conformable to the course of nature, which seems delighted with transmutations."

"Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it."

"The great ocean of truth lay all undiscovered before me."

"The parts of all homogeneal hard bodies which fully touch one another, stick together with a very strong attraction."