Sometimes the words come easily. Other times the page stares back at you blank.
The word you want evades you and you can’t go in with a substitute because it’s that word you need that conveys all meaning and tone. If you put in something else for now, you will forget to go back and if you do remember, you can’t remember what you were trying to capture.
Then at three or four o’clock in the morning you will roll over in your sleep and suddenly have the word you were looking for. Finally. You think you will remember it when you wake up — but you don’t.