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The first of self-conceitedness is the ruin of the mind. He who can control his tongue will be safe from the problems that it originates. He who cannot amend his manners will suffer many defects. He whose manners are ill will be detested by his family members. A single word often spoils the grace. Thanks, is a shelter against sedition. Dignity is the head of personality. Submission is the interceder of the guilty. The origin of determination is the avoidance of going into suspicious matters. The treasures of provisions lie in the broadness of mannerism.
— ALI IBN ABI TALIB