Sadly descends the autumn evening

The scene is Autumn, but Matthew Arnold's long poem “Rugby Chapel” (November, 1857) is not about the season at all. A gloomy autumn evening in the grounds of Rugby school leads to a reverie about his father, the former headmaster; how he was one of those bright, heroic Victorian souls (like Tennyson's Ulysses) who helped round up the doubters and stragglers and keep them on the road to glory. The poem is stitched together from fragments of Thomas Arnold's sermons. I could imagine his earnest but skeptical son, like so many of his generation, looking back on this glowing and strenuous certainty with genuine nostalgia through the gathering darkness. 

Coldly, sadly descends
The autumn evening. The Field
Strewn with its dank yellow drifts
Of wither’d leaves, and the elms,
Fade into dimness apace,
Silent;—hardly a shout
From a few boys late at their play!
The lights come out in the street,
In the school-room windows; but cold,
Solemn, unlighted, austere,
Through the gathering darkness, arise
The Chapel walls, in whose bound
Thou, my father! art laid.[...]

What is the course of the life
Of mortal men on the earth?—
Most men eddy about
Here and there—eat and drink,
Chatter and love and hate,
Gather and squander, are raised
Aloft, are hurl’d in the dust,
Striving blindly, achieving
Nothing; and, then they die—
Perish; and no one asks
Who or what they have been,
More than he asks what waves
In the moonlit solitudes mild
Of the midmost Ocean, have swell’d,
Foam’d for a moment, and gone.[...]

See! in the rocks of the world
Marches the host of mankind,
A feeble, wavering line.
Where are they tending?—A God
Marshall’d them, gave them their goal.—
Ah, but the way is so long!
Years they have been in the wild!
Sore thirst plagues them; the rocks,
Rising all round, overawe.
Factions divide them; their host
Threatens to break, to dissolve.
Ah, keep, keep them combined!
Else, of the myriads who fill
That army, not one shall arrive!
Sole they shall stray; in the rocks
Labour for ever in vain,
Die one by one in the waste.

Then, in such hour of need
Of your fainting, dispirited race,
Ye, like angels, appear,
Radiant with ardour divine.
Beacons of hope, ye appear!
Languor is not in your heart,
Weakness is not in your word,
Weariness not on your brow.
Ye alight in our van; at your voice,
Panic, despair, flee away.
Ye move through the ranks, recall
The stragglers, refresh the outworn,
Praise, re-inspire the brave.
Order, courage, return.
Eyes rekindling, and prayers,
Follow your steps as ye go.
Ye fill up the gaps in our files,
Strengthen the wavering line,
Stablish, continue our march,
On, to the bound of the waste,
On, to the City of God.

Read the whole poem, and an excellent short biography of Arnold here.