In youth, choices are made for you. These become impressions. As an adult, you use these impressions to make your own choices. Those choices generate an effect, a consequence, or a reaction. If you’re happy with the consequence, you probably won’t change your impression. But if you don’t like the consequence, you can revisit the impression and decide whether it steered you wrong. If it did, you can break the cycle by forming a new impression, which then steers you to a new choice, from which you get a new reaction. This is the cycle of karma.