Thus, when the lamp that lighted
The traveller at first goes out,
He feels awhile benighted,
And looks around in fear and doubt.
But soon, the prospect clearing,
By cloudless starlight on he treads,
And thinks no lamp so cheering
As that light which Heaven sheds.

I'd mourn the Hopes. - Bartlett's Familiar Quotations, 10th ed. (1919)