"A song is anything that can walk by itself"

Bob Dylan's quote recommends that a song is something that can exist separately and without the requirement for external support. It suggests that a song is something that can base on its own, without depending on other aspects to make it complete. This could be interpreted as a metaphor for the power of music, which can be taken pleasure in and valued without the need for any other accompaniment. It could also be viewed as a suggestion that a tune is more than simply a collection of notes and words, but rather a living, breathing entity that can move and motivate people. Ultimately, Dylan's quote is a pointer that a tune is something that can exist and grow on its own, without the need for any other external support.