What is the mood the chambered nautilus?

The mood of "The Chambered Nautilus" by Oliver WenDELL Holmes is contemplative and reflective. The poem explores themes of growth, transformation, and the journey of life through the metaphor of the nautilus shell, which symbolizes the passage of time and personal development. There is a sense of nostalgia and aspiration, as the speaker encourages the reader to embrace change and strive for higher ideals, ultimately fostering a mood of hope and inspiration.