What is food to one man may be fierce poison to others

What can give us more sure knowledge than our senses? How else can we distinguish between the true and the false?

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.

Under what law each thing was created, and how necessary it is for it to continue under this, and how it cannot annul the strong rules that govern its lifetime.

[N]ature repairs one thing from another and allows nothing to be born without the aid of another's death.

Assuredly whatsoever things are fabled to exist in deep Acheron, these all exist in this life. There is no wretched Tantalus, fearing the great rock that hangs over him in the air and frozen with vain terror. Rather, it is in this life that fear of the gods oppresses mortals without cause, and the rock they fear is any that chance may bring.

Tis pleasant to stand on shore and watch others labouring in a stormy sea.