If your idleness is a complete slump,...

If your idleness is a complete slump, that is, indecision, fretting, worry, or due to over-feeding and physical mugginess, that is bad, terrible and utterly sterile. Or if it is that idleness which so many people substitute for creative idleness, such as gently feeding into their minds all sorts of printed bilge like detective stories and newspapers, that is too bad and utterly uncreative.