I think in a way you're doomed once you can envision something. You're sort of doomed to make it happen. I've found that the moment I can envision leaving a relationship that's usually the moment that the relationship starts to fall apart.

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We need to teach the highly educated man that it is not a disgrace to fail and that he must analyze every failure to find its cause. He must learn how to fail intelligently for failing is one of the greatest arts in the world.