What happens when you let go of a helium balloon? It floats into the atmosphere on its own, until it bursts and merges with the sky.
It's like that with our own enlightenment, where it's best to think of "light" in terms of weight.
By cutting or letting go of everything that holds us down or back, we free ourselves. Attachments. Negative psychological and or emotional patterning. Resistance.
It's as if enlightenment is trying to happen but our various blockages get in the way of it.