Every science has for its basis a system of principles as fixed and unalterable as those by which the universe is regulated and governed. Man cannot make principles; he can only discover them.

How necessary it is at all times to watch against the attempted encroachment of power, and to prevent its running to excess.

That which is now called natural philosophy, embracing the whole circle of science, of which astronomy occupies the chief place, is the study of the works of God, and of the power and wisdom of God in his works, and is the true theology.

Death is not the monarch for the dead, but of the dying. The moment he obtains a conquest he loses a subject.

The Almighty Lecturer, by displaying the principles of science in the structure of the universe, has invited man to study and to imitation. It is as if He has said to the inhabitants of this globe that we call ours, "I have made an earth for man to dwell upon, and I have rendered the starry heavens visible, to teach him science and the arts. He can now provide for his own comfort, and learn from my munificence to all to be kind to each other.

Let it be told to the future world, that in the depth of winter, when nothing but hope and virtue could survive, the city and the country, alarmed at one common danger, came forth to meet and to repulse it.

I would not dare so dishonor my Creator's name by attaching it to this filthy book.