Nature is, above all, profligate. Don't believe them when they tell you how economical and thrifty nature is, whose leaves return to the soil. Wouldn't it be cheaper to leave them on the tree in the first place? This deciduous business alone is a radical scheme, the brainchild of a deranged manic-depressive with limitless capital. Extravagance! Nature will try anything once.
Have you murdered anyone in the last day, week, month, year, decade? Probably not. Then don't worry about it. Give yourself a break. You're probably a really fine person.