Everything we do or choose not to do has some sort of impact. The effect of our action / inaction might be felt immediately, or four weeks later, or maybe not in our lifetime. Taking the time to think about the impacts of our lives can often motivate us to make adjustments to how we do things - perhaps adding to the positive and reducing the negative. It is too 'doom and gloom' to think everything we do is ruinous. It is demoralizing to attempt (or to expect others) to have no impact at all.