In the poem "The Daffodils" how does nature affect the speaker's state of mind?

In William Wordsworth's poem "The Daffodils," the speaker
reflects upon a time when, during a solitary stroll, the speaker came upon a field of
daffodils. By looking upon the flowers, the speaker was able to find solace and
amazement in nature around him:

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What wealth the show to me had
brought:

Later, the speaker
reflects upon nature as he came upon it in the field. The speaker states that whenever
he is in a vacant or pensive mood, reflecting upon the scene brings about bliss and
pleasure. It is at that time, when remembering the image of nature in the field, that
the speaker's heart can "dance with the
daffodils."

Therefore, nature affects the speaker in a very
positive way. Without the ability to remember the field, the speaker would have no way
to bring about release from the pensive moods that come on.