'But I must think it one or the other.'
'By my father's soul, you must not--until you have some evidence. Can you not remain in doubt?'
'I don't know that I have ever tried.'
'You must learn to, if you are to come far with me. It is not hard to do it. In Eschropolis, indeed, it is impossible, for the people who live there have to give an opinion once a week or once per day, or else Mr. Mammon would soon cut off their food. But out here in the country you can walk all day and all the next day with an unanswered question in your head: you need never speak until you have made up your mind.'
The Pilgrim's Regress by C.S.Lewis, Book 4 Chapter 3