Analysis of A Dull Uncertain Brain,

A dull uncertain brain,
But gifted yet to know
That God has cherubim who go
Singing an immortal strain,
Immortal here below.
I know the mighty bards,
I listen when they sing,
And now I know
The secret store
Which these explore
When they with torch of genius pierce
The tenfold clouds that cover
The riches of the universe
From God's adoring lover.
And if to me it is not given
To fetch one ingot thence
Of the unfading gold of Heaven
His merchants may dispense,
Yet well I know the royal mine,
And know the sparkle of its ore,
Know Heaven's truth from lies that shine--
Explored they teach us to explore.