The moon is in her full splendour and sheds her silver beams on all around. How delightful to walk now [that] we can view from Nature up to Nature's God.
For first part compare:
Hesperus, that led
The starry host rode brightest, till the Moon,
Rising in clouded majesty, at length,
Apparent queen, unveil'd her peerless light,
And o'er the dark her silver mantle threw.
—Milton, Paradise Lost, IV, vv. 605-09.
For last part, compare:
Slave to no sect, who takes no private road,
But looks thro' Nature, up to Nature's God,
Pursues that chain which links th'immense design,
Joins heav'n and earth, and mortal and divine.
—Alexander Pope, An Essay on Man, Epistle IV, vv. 331-34.
The idea that the beauty of Nature can lead to God comes up frequently in 18th century literature. In The Romance of the Forest, the attitudes of Clara and La Luc are similar to Louisa's attitude here.
"I am unwilling," said Clara, "to quit this charming spot. How delightful would it be to pass one's life beneath these shades with the friends who are dear to one!"

"The view of these objects," said La Luc, "lift the soul to their Great Author, and we contemplate with a feeling almost too vast for humanity--the sublimity of his Nature in the grandeur of his works."

—Ann Radcliffe, The Romance of the Forest (The World's Classics, Oxford University Press, 1986), p. 265. Chloe Chard's Introduction and Explanatory Notes to this edition are particularly illuminating. Novel first pub. 1791.