Pay attention to the things that are critical to your happiness and the happiness of others.

All evil is good become cancerous.

Well, sir to say that when the impossible has been eliminated, whatever remains, however improbable, is the truth, is to make the assumption, usually justified, that everything that is to be considered has indeed been considered. Let us suppose we have considered ten factors. Nine are clearly impossible. Is the tenth, however improbable, therefore true? What if there were an eleventh factor, and a twelfth, & a thirteenth...

All roads lead to Trantor, and that is where all stars end.

It is not so much that I have confidence in scientists being right, but that I have so much in nonscientists being wrong.

Jobs also used the meetings to enforce focus. At Robert Friedland's farm, his job had been to prune the apple trees so that they would stay strong, and that became a metaphor for his pruning at Apple. Instead of encouraging each group to let product lines proliferate based on marketing considerations, or permitting a thousand ideas to bloom, Jobs insisted that Apple focus on just two or three priorities at a time. " There is no one better at turning off the noise that is going on around him," Cook said. " That allows him to focus on a few things and say no to many things. Few people are really good at that.