Lucretius

Therefore, this terror of the mind and the darkness must be dispelled not by the rays of the sun or the bright light of day, but by the appearance and reasoning of nature.

So it is more useful to watch a man in times of peril, and in adversity to discern what kind of man he is; for then at last words of truth are drawn from the depths of his heart, and the mask is torn off, reality remains.

From nothing comes nothing. Nothing that exists can be destroyed. All changes are due to the combination and separation of atoms.

All things keep on in everlasting motion, out of the infinite come the particles speeding above, below, in endless dance.

What once sprung from the earth sinks back into the earth.

The drops of rain that fall upon the stone in course of time will wear their way through it.

Life is given to none for freehold, to all on lease.

We are each of us angels with only one wing, and we can only fly by embracing one another.

Pleasant it is, when over a great sea the winds trouble the waters, to gaze from shore upon another's great tribulation — not because any man's troubles are a delectable joy, but because to perceive what ills you are free from yourself is pleasant.

The nature of things has by no means been made for us by divine power — so great are the faults it stands endowed with.