"There are fashions in reading, even in thinking. You don't have to follow them unless you want to. On the other hand, watch out. Don't stick too closely to your favorite subject. That would keep you from adventuring into other fields. It's silly to build a wall around your interests."

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Many rules for the creation of colour schemes have been published in recent years, but, while they are popular in commercial studies, I know of no creative artist who employs them. They are, per se, restrictive; their use precludes any chance of adventuring in this interesting field.

— Walter J. Phillips