Imagination and memory are key elements in Wordworth's poetry. Throughout the poem 'I Wandered Lonely as a Cloud', there is a sense of recollection and thus lack of immediacy that prevails. Memory is presented as something that the poet treasures and that brings him peace, it is almost as a character itself that 'flashes' unexpectedly and uncontrollably as lightening. In order to have this active memory to occur, one needs first passivity to welcome it. There is a movement of back and forth between passivity and activity. Memory is activated when lying down in passivity. The active component is also found in the sense of cultivating memory and perception. In other words, wise passivity allows one's mind to be more receptive to perceptions, sensations and memories which are active and conscious processes. This process can only enrich the mind and is another way to acquire knowledge.
Extract from Wordworth's poem 'Expostulation and Reply'
The eye it cannot chuse but see,
We cannot bid the ear be still;
Our bodies feel, where'er they be,
Against, or with our will.
Nor less I deem that there are powers,
Which of themeselves our minds impress,
That we can feed this mind of ours,
In a wise passiveness.
Wordsworth, William. Wordsworth's poetry and prose. Ed. Halmi Nicholas, New York: W.W. Norton Company, 2013, p. 59.