Page:The Practice of Diplomacy - Callières - Whyte - 1919.djvu/65

 at those critical moments and unforeseen occasions when the command of one's temper is of importance, especially at the acute moments of diplomatic controversy when a choleric word may poison the minds of those with whom negotiations are in progress. It is also difficult for any man who is easily irritated to remain master of his own secret; for, when his anger is aroused, he will allow words to escape him from which an adroit hearer will easily divine the essence of his thought, and thus lead to the ruin of his plans.

Before his elevation to the cardinalate, Cardinal Mazarin was sent on an important mission to the Duke of Feria, Governor of Milan. He was charged to discover the true feelings of the Duke on a certain matter, and he had the cunning to inflame the Duke's anger and thus to discover what he would never have known if the Duke himself had maintained a wise hold over his feelings. The Cardinal indeed had made himself absolute master of all the outward effects which passion usually produces, so much so that neither in his speech nor by the least change in his countenance could one discover his real thought; and this quality which he possessed in so high a degree contributed largely to make him one of the greatest negotiators of his time.

A man who is master of himself and always acts with sang-froid has a great advantage over him who