I Will by The Beatles is a classic love song that expresses unwavering devotion and commitment. The song's lyrics focus on a promise of eternal love and faithfulness, even when the beloved is not physically present. Themes of patience, hope, and constancy permeate the song as the narrator vows to remain true and wait for the one they love. Poignant moments include lines like 'Love you forever and forever, Love you with all my heart' which emphasize the depth and permanence of the feelings being expressed.