Lucretius

Life is one long struggle in the dark.

Such are the heights of wickedness to which men are driven by religion.

Thus the sum of things is ever being reviewed, and mortals dependent one upon another. Some nations increase, others diminish, and in a short space the generations of living creatures are changed and like runners pass on the torch of life.

The drops of rain make a hole in the stone, not by violence, but by oft falling.

What is food to one man is bitter poison to others.

The first beginnings of things cannot be distinguished by the eye.

But if one should guide his life by true principles, man's greatest wealth is to live on a little with contented mind; for a little is never lacking.