Knowing how to assess the credibility of a sourceis useless unless the person develops a sensitivity and dis-position to question what reasonably warrants question-ing.

When a tutor has observed these indications, let him next consider how the mind of his pupil is to be managed. Some boys are indolent unless you stimulate them; some are indignant at being commanded; fear restrains some and unnerves others; continued labor forms some; with others, hasty efforts succeed better