No problem, stress ye not! It's not so much about lyrics en masse, but for a certain line that stands out and gets stuck in your brain, much like a jingle would, but with a greater level of emotional/intellectual/spiritual attachment or meaning.

Another example for myself would be one I used for this icon, which was from a Doors lyric:

No eternal reward will forgive us now for wasting the dawn."

The brain is an amazing organ... you never know what may emerge from its hidden recesses!