1. Anaphora: Repetition of the phrase "I won't give up" at the beginning of multiple lines creates emphasis and reinforces the theme of perseverance.
2. Alliteration: Repetition of consonant sounds in a line, such as "our time has come" and "for that I will fight."
3. Assonance: Repetition of vowel sounds in a line, such as "you won't give up on me" and "it's all in your eyes."
4. Metaphor: The song uses metaphors to convey emotions and experiences, such as comparing love to a "waterfall" and describing the journey of a relationship as "climbing a mountain."
5. Simile: The song employs similes to compare emotions and situations, such as "I won't give up like a river at its end" and "I won't give up on this love like a ship on the shore."
6. Repetition: Throughout the song, certain words and phrases are repeated to create a sense of emphasis and urgency, such as "won't give up" and "no matter what it takes."
These sound devices contribute to the overall poetic nature of Jason Mraz's song, enhancing the emotional impact and memorability of the lyrics.