How rhyme shapes a lyric
Launch library · evergreen read

Rhyme gives a lyric a genuine sense of inevitability as it unfolds, signalling clearly to the ear that a particular line has reached its natural completion and quietly setting up an expectation that the next line will soon follow that very same established pattern, whether the listener notices this consciously or not.
Used well, rhyme can also meaningfully emphasise the underlying sense of a lyric, placing genuinely important words right at the end of a line where the ear naturally pays its closest attention, letting sound and sense reinforce one another rather than compete for the listener's limited attention within the very same phrase.
Writers often balance rhyme carefully against more conversational, deliberately unrhymed lines in order to avoid a lyric feeling forced or overly mechanical, and that careful mix keeps the language sounding genuinely natural, closer to ordinary speech, even while quietly following a considered musical pattern running underneath the surface the whole time.