But how beautiful is the sea! How pleasant to see the extent of it! What a multitude and variety of islands! How delightful are the coasts! What numbers and what diversity of inhabitants does it contain; some within the bosom of it, some floating on the surface, and others by their shells cleaving to the rocks! While the sea itself, approaching to the land, sports so closely to its shores that those two elements appear to be but one.
Next above the sea is the air, diversified by day and night: when rarefied, it possesses the higher region; when condensed, it turns into clouds, and with the waters which it gathers enriches the earth by the rain. Its agitation produces the winds. It causes heat and cold according to the different seasons. It sustains birds in their flight; and, being inhaled, nourishes and preserves all animated beings.
XL. Add to these, which alone remaineth to be mentioned, the firmament of heaven, a region the farthest from our abodes, which surrounds and contains all things. It is likewise called ether, or sky, the extreme bounds and limits of the universe, in which the stars perform their appointed courses in a most wonderful manner; among which, the sun, whose magnitude far surpasses the earth, makes his revolution round it, and by his rising and setting causes day and night; sometimes coming near towards the earth, and sometimes going from it, he every year makes two contrary reversions[165] from the extreme 293point of its course. In his retreat the earth seems locked up in sadness; in his return it appears exhilarated with the heavens. The moon, which, as mathematicians demonstrate, is bigger than half the earth, makes her revolutions through the same spaces[166] as the sun; but at one time approaching, and at another receding from, the sun, she diffuses the light which she has borrowed from him over the whole earth, and has herself also many various changes in her appearance. When she is found under the sun, and opposite to it, the brightness of her rays is lost; but when the earth directly interposes between the moon and sun, the moon is totally eclipsed. The other wandering stars have their courses round the earth in the same spaces,[167] and rise and set in the same manner; their motions are sometimes quick, sometimes slow, and often they stand still. There is nothing more wonderful, nothing more beautiful. There is a vast number of fixed stars, distinguished by the names of certain figures, to which we find they have some resemblance.
XLI. I will here, says Balbus, looking at me, make use of the verses which, when you were young, you translated from Aratus,[168] and which, because they are in Latin, gave me so much delight that I have many of them still in my memory. As then, we daily see, without any change or variation,
—the rest[169]
Swiftly pursue the course to which they’re bound;
And with the heavens the days and nights go round;
the contemplation of which, to a mind desirous of observing the constancy of nature, is inexhaustible.
The extreme top of either point is call’d
The pole.[170]