The least movement is of importance to all nature. The entire ocean is affected by a pebble.

Small actions do not vanish. They get absorbed into a system far too large for you to watch, so you will almost never see where a courtesy, a warning or a piece of honesty ends up, and that invisibility is not evidence that nothing happened. The same holds for the careless things, which is the sobering half.

Stop grading what you do by whether you can see it land. Do the small right thing when nobody will report back. And treat your small carelessness seriously, since it travels exactly as far.