When Reason seemed the most to assert her rights,
When most intent on making of herself
A prime Enchantress—to assist the work
Which then was going forward in her name!
Not favoured spots alone, but the whole earth,
The beauty wore of promise, that which sets
(As at some moment might not be unfelt
Among the bowers of paradise itself )
The budding rose above the rose full blown.
What temper at the prospect did not wake
To happiness unthought of? The inert
Were roused, and lively natures rapt away!
They who had fed their childhood upon dreams,
The playfellows of fancy, who had made
All powers of swiftness, subtilty, and strength
Their ministers,—who in lordly wise had stirred
At this point in the poem, Wordsworth is showing us the point of view of many of the revolutionaries years after the start of the war, most likely in the time known as the “reign of terror”. This line is signifying the acceptance of failure; what was originally intended to be a political uprising to install a new constitution quickly devolved into a bloody slaughter. 
 Ironically enough, life seemed better under a monarch than under the new National assembly that had been established after the beheading of Louis XVI. The revolutionaries who had dreamed of a France with more political power under a constitution that would prevent them from being taken advantage of by the first and second estates can only see this idea now as a dream.
The French Revolution as It Appeared to Enthusiasts at Its Commencement