gurbani has multiple levels of meaning.
for instance :
from sukhmani sahib ashtapadi 1 : "prabh kae simran pooran aasa"
what does it mean ? most would say it means "remembering god, one's desires are fulfilled in the sense one gets what one wants"
deeper meaning is "remembering god, one's desires are fulfilled (without getting thing) and no more desires are left, hence 'pooran aasa''