I was asked to act when I couldn't act. I was asked to sing 'Funny Face' when I couldn't sing, and dance with Fred Astaire when I couldn't dance. Do what you can't do!
孔子说:“不到苦思冥想时,不去提醒;不到欲说无语时,不去引导。不能举一例能理解三个类似的问题,就不要再教他了。”
There is no failure except in no longer trying.