Borrow has affirmed that from a study of the Newgate Calendar

In twain, at once the lower part of them

Is lost entire, and earth is overcast

Where'er the thunderheads are rolled along-

So know thou mayst that things forever need

A fresh replenishment of gleam and glow,

And each effulgence, foremost flashed forth,

Perisheth one by one. Nor otherwise

Can things be seen in sunlight, lest alway