In choice of instruments, it is better to choose men of a plainer sort, that are like to do that, that is committed to them, and to report back again faithfully the success, than those that are cunning, to contrive, out of other men”s business, somewhat to grace themselves, and will help the matter in report for satisfaction”s sake. Use also such persons as affect the business, wherein they are employed; for that quickeneth much; and such, as are fit for the matter; as bold men for expostulation, fair-spoken men for persuasion, crafty for inquiry and observation, froward, and absurd men, for business that doth not well bear out itself.
Use also such as have been lucky, and prevailed before, in things wherein you have employed them; for that breeds confidence, and they will strive to maintain their prescription. It is better to sound a person, with whom one deals afar off than to fall upon the point at first; except you mean to surprise him by some short question. It is better dealing with men in appetite, than with those that are where they would be.
If a man deal with another upon conditions, the start or first performance is all; which a man cannot reasonably demand, except either the nature of the thing be such, which must go before; or else a man can persuade the other party, that he shall still need him in some other thing; or else that he be counted the honester man. All practice is to discover, or to work. Men discover themselves in trust, in passion, at unawares, and of necessity, when they would have somewhat done, and cannot find an apt pretext.
If you would work any man, you must either know his nature and fashions, and so lead him; or his ends, and so persuade him or his weakness and disadvantages, and so awe him or those that have interest in him, and so govern him. In dealing with cunning persons, we must ever consider their ends, to interpret their speeches; and it is good to say little to them, and that which they least look for. In all negotiations of difficulty, a man may not look to sow and reap at once; but must prepare business, and so ripen it by degrees.