The main difficulty of thinking is confusion. We try to do too much at once. Emotions, information, logic, hope and creativity all crowd in on us. It is like juggling with too many balls.
What I am putting forward in this book is a very simple concept which allows a thinker to do one thing at a time. He or she becomes able to separate emotion from logic, creativity from information and so on.
(Six Thinking Hats by Edward de Bono)