"Trust in good verses then:

They only shall aspire,

When pyramids, as men

Are lost i'the funeral fire."

As the tale is told by Plato, in the tenth book of his Republic, one Er the son of Arminius, a Pamphylian, was slain in battle; and ten days afterwards, when they collected the bodies for burial, his body alone showed no taint of corruption. His relatives, however, bore it off to the funeral pile; and on the twelfth day, lying there, he returned to life and told them what he had seen in the other world. Many wonders he related concerning the dead, for example, with their rewards and punishments: but most wonderful of all was the great Spindle of Necessity which he saw reaching up into heaven with the planets revolving around it in whorls of graduated width and speed, yet all concentric and so timed that all complete the full circle punctually together.—"The Spindle turns on the knees of Necessity: and on the rim of each whorl sits perched a Siren, who goes round with it, hymning a single note; the eight notes together forming one harmony."

The fable is a pretty one: but Er the Pamphylian comes back to report no more than the one thing Man already grasps for a certainty amid his welter of guesswork about the Universe—that its stability rests on ordered motion—that the "firmament" stands firm on a balance of active and tremendous forces somehow harmoniously composed. Theology asks "By whom?": Philosophy inclines rather to guess "How?" Natural Science, allowing that these questions are probably unanswerable, contents itself with mapping and measuring what it can of the various forces. But all agree about the harmony: and when a Newton discovers a single rule of it for us, he but makes our assurance surer.

For uncounted centuries before ever hearing of "Gravitation" men knew of the sun that he rose and set at hours which, though mysteriously appointed, could be accurately predicted; of the moon that she regularly waxed and waned, drawing the waters of the earth in a flow and ebb, the gauge of which and the time-table could be advertised beforehand in the almanack; of the stars, that they swung as by clockwork around the pole. Says the son of Sirach concerning them—

At the word of the Holy one they will stand in due order,
And they will not faint in their watches.

So evident is this celestial harmony that men, seeking to account for it by what was most harmonious in themselves or in their experience, supposed an actual Music of the Spheres inaudible to mortals; Plato (who learned of Pythagoras) inventing his Octave of Sirens, spinning in the whorls of the great planets and intoning as they spin; Chaucer (who learned of Dante and makes the spheres nine) in his Parliament of Foules telling, out of Cicero's Somnium Scipionis, how the great Scipio Africanus visited his descendant in a dream and—

Shewed he him the litel erthe, that heer is,
In regard of the hevenes quantité:
And after shewed he him the nynè sperés,
And after that the melodye herde he
That cometh of thilke sperés thryés-three
That welle is of musicke and melodye
In this world heer, and cause of armonye.

While Shakespeare in the last Act of The Merchant of Venice makes all the stars vocal, and not the planets only:

There's not the smallest orb which thou beholdest
But in his motion like an angel sings,
Still quiring to the young-eyed cherubims...

And Milton in Arcades goes straight back to Plato (save that his spheres are nine, as with Chaucer):

then listen I
To the celestial Sirens' harmony
That sit upon the nine enfolded spheres
And sing to those that hold the vital shears
And turn the adamantine spindle round
Of which the fate of gods and men is wound.
Such sweet compulsion doth in music lie
To lull the daughters of Necessity,
And keep unsteady Nature to her law,
And the low world in measured motion draw
After the heavenly tune.

From the greater poets let us turn to a lesser one, whom we shall have occasion to quote again by and by: to the Orchestra of Sir John Davies (1596), who sees this whole Universe treading the harmonious measures of a dance; and let us select one stanza, of the tides:

For lo, the sea that fleets about the land,
And like a girdle clips her solid waist,
Music and Measure both doth understand;
For his great Crystal Eye is always cast
Up to the Moon, and on her fixèd fast;
And as she daunceth in her pallid sphere,
So daunceth he about the centre here.

This may be fantastic. As the late Professor Skeat informed the world solemnly in a footnote, "Modern astronomy has exploded the singular notion of revolving hollow concentric spheres...." (The Professor wrote "singular" when he meant "curious."—The notion was never "singular.") "These 'spheres,'" he adds, "have disappeared, and their music with them, except in poetry." Nevertheless the fable presents a truth, and one of the two most important truths in the world. This Universe is not a Chaos. (If it were, by the way, we should be unable to reason about it at all.) It stands and is continually renewed upon an ascertained harmony: and what Plato called "Necessity" is the duty in all things of obedience to that harmony, the Duty of which Wordsworth sings in his noble Ode,

Thou dost preserve the stars from wrong,
And his most ancient heavens, through thee, are fresh and strong.