Do we not see all humans unaware Of what they want, and always searching everywhere, And changing place, as if to drop the load they bear?

Sweet it is, when on the high seas the winds are lashing the waters, to gaze from the land on another's struggles.

Huts they made then, and fire, and skins for clothing, And a woman yielded to one man in wedlock... ... Common, to see the offspring they had made; The human race began to mellow then. Because of fire their shivering forms no longer Could bear the cold beneath the covering sky.

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

... deprived of pain, and also deprived of danger, able to do what it wants, [Nature] does not need us, nor understands our deserts, and it cannot be angry.

All things obey fixed laws.

No fact is so simple that it is not harder to believe than to doubt at the first presentation. Equally, there is nothing so mighty or so marvelous that the wonder it evokes does not tend to diminish in time.