The biggest Yes it is some times a NO!

Great achievements require monstrous unrest, worries, fret … but achievements will be always delayed by false Yes, from people afraid of NO! Say NO, and get out of my way, it is a long way up, and your YES is slowing us down.

It takes guts to say No, I do not know, I can not, never heard of it. Learn that and you will be fine. Otherwise you will be knock down, sooner or later.