Did it ever strike you that goodness is not merely a beautiful thing, but by far the most beautiful thing in the whole world? So that nothing is to be compared for value with goodness; that riches, honor, power, pleasure, learning, the whole world and all in it, are not worth having in comparison with being good; and the utterly best thing for a person is to be good, even though they were never to be rewarded for it.

For science is ... like virtue, its own exceeding great reward.

Men must work, and women must weep.

There are two freedoms - the false, where a man is free to do what he likes; the true, where he is free to do what he ought.

In the four hundred and thirteenth year of the Christian era, some three hundred miles above Alexandria, the young monk Philammon was sitting on the edge of a low range of inland cliffs, crested with drifting sand.

The most wonderful and the strongest things in the world, you know, are just the things which no one can see.

Nature's deepest laws, her only true laws, are her invisible ones.