Regression towards the medium. In any given data-set, there will always be a tendency towards the mean. A student scores an average 70%. He scores a 45% on a test. Teacher yells at student; student improves and scores a 73% next test. The teacher’s yelling (or praise) didn’t cause the change. The aberration was possibly random.
Mediocrity principle: you aren’t special. Most of what happens in the world is just the consequence of natural, universal laws, that apply to everyone and to everything, with no special exemptions of amplifications for your benefit. The world is NOT intent; it lacks both benevolence and malevolence.