That employee who just quit? They were giving you hints for a long time now. It took them quitting for you to notice.
That client who just left you for your biggest competitor? They tipped you off multiple times. It took them leaving for you to notice.
That “I can’t this anymore” moment you just had? You knew it all along. It was just now that you decided to pay attention to yourself.
That problem? It’s been there a long time. Pay attention to the small things and you will notice it before it forces you to notice it.