I went into Starfleet though I was a good ten years older than most of my classmates. And I listened hard to the teachers. I was strong on theory, but they'd been out there.
"A ship is a living thing," they told us, "with a crew for hands, a captain for a brain, and a doctor for a heart. You have to pump hard to keep a ship alive."
But this ship had a brain when we came aboard, and damned if I haven't been demoted to liver. The Enterprise already has a heart, and his name is Jim Kirk.