"When you believe you have found an important scientific fact, and are feverishly curious to publish it, constrain yourself for days, weeks, years sometimes, fight yourself, try and ruin your own experiments, and only proclaim your discovery after having exhausted all contrary hypotheses. But when, after so many efforts you have at last arrived at a certainty, your joy is one of the greatest which can be felt by a human soul."

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Lack of self-confidence is, more often than not, simple laziness. We feel confused and uncertain because we do not know. But instead of making the effort to investigate, we procrastinate and worry. We tell ourselves we can't instead of learning how we can. If we used the mental energy we expend in worry and fear to get out and find out about what we do not know, we would see our self-confidence grow. Lack of self-confidence is not overcome by faith, but by action. It is a lack, not of certainty, but of effort. Too often we are certain that we can't before we give ourselves a fair chance.

— Laurence Boldt