Why do the hard things?

Why do the hard things?
Because some can't.
Because I don't want to be flabby
And I don't want to be bored.
Because I'm making an account
And I want to count.
Because I love you
And you're worth it.
Because the hardest thing
Was done for me.
Because I am an insanely
Inconstant whirligig
And this, this is a ramrod
Up my spine, it's
Adrenaline-charged
Headlong crashing and it's
How I achieve flight and
I'm crying just to know
More and better and deeper
And because you, you
Are everything that was ever
Worthwhile and you lie at the end,
Where all my efforts cease,
That you might say,
"Well done."