Kai (meeting, coming together), Hanare (release), and Zanshin (Remaining heart/mind).

I cannot 'finish' until the arrow leaves... yet the arrow cannot leave until I finish.
So I finish even though I can't and the arrow leaves even though it can't.
Both of us finish anyhow, even though we can't.

It's an act of faith, like the morning bird who sings before the sun rises.
He can't sing til the sun rises, but the sun cannot rise til he sings, so together they sing anyhow.