It is a great matter to be in authority over others; for authority, if it be rightly used, will make you feared beyond your actual resources.
Francesco GuicciardiniBy numberless examples it will evidently appear that human affairs are as subject to change and fluctuation as the waters of the sea agitated by the winds.
Francesco GuicciardiniBe careful how you do one man a pleasure which must needs occasion equal displeasure in another. For he who is thus slighted will not forget, but will think the offence to himself the greater in that another profits by it; while he who receives the pleasure will either not remember it, or will consider the favour done him less than it really was.
Francesco Guicciardini