Politeness is to human nature what warmth is to wax. Counsels and Maxims

What man can pretend to know the riddle of a woman's mind? Don Quixote

“One who becomes a prince through the favour of the people ought to keep them friendly, and this he can easily do seeing they only ask not to be oppressed by him.” The Prince

The effect of speech upon the condition of the soul is comparable to the power of drugs over the nature of bodies. For just as different drugs dispel different secretions from the body, and some bring an end to disease and others to life, so also in the case of speeches, some distress, others delight, some cause fear, others make the hearers bold, and some drug and bewitch the soul with a kind of evil persuasion. Gorgias