Okay kiddo, so proportionalism is a fancy way of saying that when we sing Gregorian chant, we need to make sure the different musical notes match up with the words we are singing. It's like a puzzle, where we have to fit the notes and words together just right so they sound good and make sense.
You know how when we count, we say "one, two, three, four"? Well, in Gregorian chant, each word gets a certain number of beats, kind of like counting. And the different notes we sing have to match up with those beats just right.
But it's not just about counting and matching up the notes and words. We also want to make sure that the music sounds beautiful and means something. So we have to think carefully about how we sing each note and word, to make it sound just right and convey the right emotions.
Overall, proportionalism is about making sure everything in our chant fits together perfectly, kind of like putting together a puzzle or creating a beautiful painting. And when we get it just right, it can be really special and meaningful.