Life is always on I'll teach you a lesson son! gear, especially when you are feeling least vulnerable or feel a little high on confidence about tackling a situation (because you've been through similar things before and got out nearly undamaged in the past). It isn't about a warlike scenario or some extraordinary circumstances that I'm talking about, sometimes even going through your daily functions when you are at peace with yourself leave alone cheerful (oblivious of the fact that something may go wrong). This is the time it strikes; a bolt from the blue ( as the cliché goes), virtually pushing you to the brink.
You may have put a lifetime to train your mind to tackle such situations smoothly. But,at that moment everything seems to be falling apart like a House of Cards. Your faith, your belief just evaporate.
Eventually you survive, regroup, maybe a little bruised, maybe scarred. Because, you are programmed for self-preservation and to cheerfully continue the charade.