Many times I have written songs I only fully understood years later, or had a bigger picture perception of the subject matter. Funny, our subconscious minds sometimes contain stuff only to be revealed in the future.
Here's my suggestion:
- Take a song you particularly like to sing or hear someone else sing, maybe you're not really sure why. It could even be a song someone else has written... but somehow you've made it your own.
- Listen to it freshly, like it contained some secret wisdom or insight you really need.