The quotation is from a poem by Keats. It mans nothing out of context and especially if you ignore the line that follows and is the main part of the sentence:
"Some shape of beauty moves away the pall
From our dark spirits. Such the sun, the moon,
Trees old, and young, sprouting a shady boon
For simple sheep; and such are daffodils
With the green world they live in; and clear rills
That for themselves a cooling covert make
'Gainst the hot season; the mid-forest brake,
Rich with a sprinkling of fair musk-rose blooms:
And such too is the grandeur of the dooms
We have imagined for the mighty dead."
So it means what is says: Some shape of beauty moves away the pall from our dark spirits ... And such too is the grandeur of the dooms we have imagined for the mighty dead.
"Some shape of beauty moves away the pall
From our dark spirits. Such the sun, the moon,
Trees old, and young, sprouting a shady boon
For simple sheep; and such are daffodils
With the green world they live in; and clear rills
That for themselves a cooling covert make
'Gainst the hot season; the mid-forest brake,
Rich with a sprinkling of fair musk-rose blooms:
And such too is the grandeur of the dooms
We have imagined for the mighty dead."
So it means what is says: Some shape of beauty moves away the pall from our dark spirits ... And such too is the grandeur of the dooms we have imagined for the mighty dead.