The thought manifests as the word. The word manifests as the deed. The deed develops into habit. And the habit hardens into character. So watch the thought and its ways with care. And let it spring from love, born out of concern for all beings.
Life is a journey, and one thing's for sure: You don't see many hearses with luggage racks on them. We're privileged to be here, so instead of just using God's resources, we should leave the place a little better than we found it - or at least leave it the same.