Yet new moons swift replace the seasons spent;
But when we forth are thrust,
Where old Aeneas, Tullus, Ancus went,
Shadow are we and dust.
 
[Damna tamen celeres reparant caelestia lunae:
nos ubi decidimus
quo pius Aeneas, quo dives Tullus et Ancus,
pulvis et umbra sumus.]

Horace (65-8 BC) Roman poet and satirist [Quintus Horacius Flaccus]

Odes [Carmina], Book 4, # 7, l. 13ff (4.7.13-16) (23 BC) [tr. Marshall (1908)]
    (Source)

"To Torquatus." (Source (Latin)). Alternate translations:

But the decays of time, Time doth repair:
When we once plunged are
Where good Aeneas, with rich Ancus wades,
Ashes we are, and shades.
[tr. Fanshawe; ed. Brome (1666)]

When we shall view the gloomy Stygian Shore,
And walk amongst the mighty Dead
Where Tullus, where Aeneas went before:
We shall be Dust, and empty shade.
[tr. Creech (1684)]

Yet the swift moons repair Heaven's detriment:
We, soon as thrust
Where good Aeneas, Tullus, Ancus went,
What are we? dust.
[tr. Conington (1872)]

Nevertheless the quick-revolving moons repair their wanings in the skies; but when we descend [to those regions] where pious Æneas, where Tullus and the wealthy Ancus [have gone before us], we become dust and a mere shade.
[tr. Smart/Buckley (1853)]

But moons revolve, and all again is bright:
We, when we fall, as fell the good and just
Æneas, wealthy Tullus, Ancus wight,
Are but a nameless shade, and some poor grains of dust.
[tr. Martin (1864)]

But the swift moons restore change and loss in the heavens,
When we go where have gone
Sire Æneas, and Tullus, and opulent Ancus,
We are dust and a shade.
[tr. Bulwer-Lytton (1870)]

The swiftly-revolving Months however restore the gifts of the Seasons but we, when we have descended where good Æneas, wealthy Tullus, and Ancus, have gone, are dust and shadow.
[tr. Elgood (1893)]

The hastening moons all waste in heaven repair:
We, when we once descend
To Tullus, Ancus, sire Aeneas, there
In dust and shadow end.
[tr. Gladstone (1894)]

Yet the revolving Moons repair the losses of heaven;
But we, when once we have gone
Where pious Æneas, rich Tullus, and Ancus, have vanish'd,
Lo! dust and ashes are we!
[tr. Phelps (1897)]

Still, rapid moving moons repair the heavenly losses:
We, when we fall
Whither the good Æneas fell, Tullus and Ancus rich,
Are dust and shadow.
[tr. Garnsey (1907)]

Yet the swiftly changing moons repair their losses in the sky. We, when we have descended whither righteous Aeneas, whither rich Tullus and Ancus have gone, are but dust and shadow.
[tr. Bennett (Loeb) (1912)]

Yet, fast as moons wane in the sky, as fast
They wax; but we, poor mortals, when we fare
Whither Aeneas, Tullus, Ancus passed,
Are naught but dust here, naught but shadows there.
[tr. Mills (1924)]

Moons make speed to repair their heavenly losses, but not so
We, who, when once we have gone
Downwards to join rich Tullus and Ancus and father Aeneas,
Crumble to shadow and dust.
[tr. Michie (1963)]

Whatever the skies lose, quick-running
Months repair -- but men, good Aeneas
Or rich Tullus or Ancus king of Rome,
Die and turn to shadows, to dust.
[tr. Raffel (1983)]

Yet after a time, and time and time again,
The moon restores itself in the nighttime sky.
But when it's time for us to go down there
Where Aeneas went, the pious, and Tullus the rich,
And old King Ancus Martius, and all the others,
Then we're nothing but dust, we're nothing but shadows.
[tr. Ferry (1997)]

And yet the swiftly phasing moons repair their celestial mishaps. While we, once descended where dwells pious Aeneas and wealthy Tullus and Ancus, dust and shadow are.
[tr. Alexander (1999)]

Yet swift moons are always repairing celestial losses:
while, when we have descended
to virtuous Aeneas, to rich Tullus and Ancus, our kings,
we’re only dust and shadow.
[tr. Kline (2015)]