Writing is selection. Just to start a piece of writing you have to choose one word and only one from more than a million in the language. Now keep go… - John McPhee

You see the rivers running east. Then you see mountains rise. Rivers run off them to the west. Mountains come up like waves. They crest, break, and spread themselves westward. When they are spent, there is an interval of time, and then again you see the rivers running eastward. You look over the shoulder of the painter and you see all that in the landscape. You see it if first you have seen it in the rock. The composition is almost infinitely less than the sum of its parts, the flickers and glimpses of a thousand million years.

A piece of writing has to start somewhere, go somewhere, and sit down when it gets there.

If you lack confidence in setting one word after another and sense that you are stuck in a place from which you will never be set free, if you feel sure that you will never make it and were not cut out to do this, if your prose seems stillborn and you completely lack confidence, you must be a writer.