In this quote, Paul McCartney is highlighting the ability and artistry of lyricists. He suggests that they have a distinct capability to control and manipulate words in such a way that is both imaginative and impactful. By "playing" with words, lyricists are able to craft lyrics that are not just pleasing to the ear, but also convey deep significance and feeling. This quote also suggests that being a lyricist requires a certain level of skill and creativity, as it takes an unique skill to effectively utilize words to create effective and memorable tunes. In general, McCartney is acknowledging the essential role that lyricists play on the planet of music.
"It is paradoxical that many educators and parents still differentiate between a time for learning and a time for play without seeing the vital connection between them"