A commander-in-chief cannot take as an excuse for his mistakes in warfare an order given by his sovereign or his minister when the person giving the order is absent from the field of operations and is imperfectly aware or wholly unaware of the latest state of affairs. It follows that any commander-in-chief who undertakes to carry out a plan which he considers defective is at fault; he must put forward his reasons, insist on the plan being changed, and finally tender his resignation rather than be the instrument of his army's downfall.
Public opinion is a mysterious and invisible power, to which everything must yield. There is nothing more fickle, more vague, or more powerful; yet capricious as it is, it is nevertheless much more often true, reasonable, and just, than we imagine.
Lead the ideas of your time and they will accompany and support you; fall behind them and they drag you along with them; oppose them and they will overwhelm you.