Short Answer 
The author experiences relaxation and joy after encountering daffodils, indicating a positive shift in his emotional state. This spiritual solitude fosters a deep connection with his inner self and nature, ultimately leading to feelings of tranquility and contentment.
Step 1: Reflect on the Author’s Mood
In the last stanza, the author expresses a sense of relaxation after encountering the daffodils. He is lying on the couch, feeling a shift in his emotional state. At this moment, he is no longer troubled by feelings of emptiness or deep contemplation.
Step 2: Understand the Concept of Solitude
The term “solitude” in these lines refers not to human loneliness but rather to a *spiritual solitude*. This type of solitude is depicted as blissful, allowing the author to connect with his inner self and the beauty surrounding him. This highlights a peace that transcends ordinary feelings of isolation.
Step 3: Acknowledge the Impact of the Experience
Following his experience with the daffodils, the author feels a deep sense of joy that fills his heart. This connection with nature has a profound effect on his emotional wellbeing, leading to feelings of peace and contentment. In summary, the overall tone of this stanza conveys tranquility, allowing the reader to sense the author’s newfound elation.