I haven't been able to get words out in a coherent order lately, so here are some other people who are (and have been) saying things much better than I can.
The Ones Who Walk Away from Omelas, Ursula K. LeGuin.
On responsibility, Bruce Baugh at Making Light
Ulysses, Alfred, Lord Tennyson
The Holy Fire, T. Thorn Coyle
The Gulf, Albert Goldbarth
(I am not as melancholy as this collection may seem. Thunderstorms encourage deep and thinking thoughts, as the sky closes in around us.)