According to Osho, genuine spiritual growth is irreversible: once you rise even an inch in being, you cannot be pulled back. External influences may obstruct you or keep you stuck at your present level, but they cannot undo the inner change. Progress continues or pauses; only stopping functions as 'going back.' Therefore, fear of regression is unfounded—attention should be on moving on and choosing company that doesn't stall you.
Once you truly grow inside, you can’t forget it; people may slow you, but they can’t push you backward.