In the summer they kill out of irritation. Not randomly, but the people you hate on the other side of the street, suddenly they rub you the wrong way and you might not let it go like you might in the winter. That 

Heat

gets to you and you just whip out your gun and before you know it you've already shot five bullets into the other person.

Time only moves in one direction, and that's the sad part about 

life

. You can kill somebody and never take it back. Never make things right. The most you can do is atone for your sins, but the people who were hurt by your actions will always be hurt.

I think this is why 

murderers

are the only people who can truly understand the finite-ness of life. Even to suffer a loss of a loved one is not enough to teach you just how irreversible everything is. People are strong. Resilient mother fuckers. They'll conquer dozens of deaths of loved ones.

But to realize you'll never be able to make it right, for having killed. That's a lesson you can never oversome.