"The fact of the matter was you had to hope and assume that a lot of capable people had done lots of capable things in a capable way, and double-checked them frequently to make sure everything was right. So worrying was stupid, wasn't it? But worrying was never quite like that. It sat like a little goblin on your shoulder and whispered."
Raising Steam by Terry Pratchett
Because I frequently tell that goblin to shutupshutupshutup.