"Discipline is the long and arduous process of convincing the mind to abide by one's conscience."

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The test of a round character is whether it is capable of surprising in a convincing way. If it never surprises it is flat. Flat characters ... in their purest form ... are constructed round a single idea or quality; when there is more than one factor to them, we get the beginning of the curve toward the round. The really flat character can be experessed in one sentence such as, "I will never desert Mr Micawber." There is Mrs Micawber - she says she won't desert Mr Micawber; she doesn't, and there she is.

— E. M. Forster