The essence, the basics, without it you make it
Allow me to make this, childlike in nature
Rhythm, you have it or you don't that's a fallacy
I'm in them, every sprouting tree, every child o' peace
Since becoming a ghostly figure, he's able to possess all sorts of things, including people and trees. Combine this with the new, wise, all-seeing eye he has developed and now he's able to imbue his sense of rhythm into everything he resides in.
Now there's no such thing as not having rhythm, because Del's got you under control.