The principal thing which helps in seeing the mind of another person is the light of intuition. Nothing else -- neither the rules, nor studies, nor standard of understanding -- can help, without the development of intuition. But one thing must be remembered: that man shows the line engraved upon his mind in his form, his expression, in his movements, in his words, in his imagination and action. And it is possible to detect a man from his word before his action, or from his movement before his action, or from his expression before his words, or from his form before even he had time to imagine. Therefore, the knowledge of this can save a great deal of trouble in life, if man only knows beforehand how to act with different people.