The song 'Old Friends' by Simon & Garfunkel is a poignant reflection on aging and the passage of time. It portrays the deep, enduring bond between old companions who have shared a lifetime of memories. The key themes include nostalgia, the melancholy of growing older, and the comfort of lasting friendship. Particularly poignant moments in the song are when the lyrics describe the peaceful, reflective state of the old friends sitting on a park bench, and the line 'How terribly strange to be seventy,' which emphasizes the surreal and sometimes challenging nature of growing old with someone you care about.