The first fundamental law of the universe is the law of three forces, of three principles, or , as it is often called, the law of three. According to this law every action, every phenomenon in all worlds without exception, is the result of a simultaneous action of three forces- the positive, the negative, and the neutralizing.
John Playfair
The Author of nature has not given laws to the universe, which, like the institutions of men, carry in themselves the elements of their own destruction; he has not permitted in his works any symptom of infancy or of old age, or any sign by which we may estimate either their future or their past duration. He may put an end, as he no doubt gave a beginning, to the present system at some determinate period of time; but we may rest assured, that this great catastrophe will not be brought about by the laws now existing, and that it is not indicated by any thing which we perceive.
