REWARD, is either of _gift_, or by _contract_. When by contract, it is called _salary_, and _wages_; which is benefit due for service performed, or promised. When of gift, it is benefit proceeding from the _grace_ of them that bestow it, to encourage, or enable men to do them service. And therefore when the sovereign of a commonwealth appointeth a salary to any public office, he that receiveth it, is bound in justice to perform his office; otherwise, he is bound only in honour, to acknowledgment, and an endeavour of requital. For though men have no lawful remedy, when they be commanded to quit their private business, to serve the public, without reward or salary; yet they are not bound thereto, by the law of nature, nor by the institution of the commonwealth, unless the service cannot otherwise be done; because it is supposed the sovereign may make use of all their means, insomuch as the most common soldier, may demand the wages of his warfare, as a debt. [Sidenote: Benefits bestowed for fear are not rewards.] The benefit which a sovereign bestoweth on a subject, for fear of some power and ability he hath to do hurt to the commonwealth, are not properly rewards; for they are not salaries; because there is in this case no contract supposed, every man being obliged already not to do the commonwealth disservice: nor are they graces; because they be extorted by fear, which ought not to be incident to the sovereign power: but are rather sacrifices, which the sovereign, considered in his natural person, and not in the person of the commonwealth, makes, for the appeasing the discontent of him he thinks more potent than himself; and encourage not to obedience, but on the contrary, to the continuance, and increasing of further extortion. [Sidenote: Salaries certain and casual.] And whereas some salaries are certain, and proceed from the public treasure; and others uncertain, and casual, proceeding from the execution of the office for which the salary is ordained; the latter is in some cases hurtful to the commonwealth; as in the case of judicature. For where the benefit of the judges, and ministers of a court of justice ariseth from the multitude of causes that are brought to their cognizance, there must needs follow two inconveniences: one, is the nourishing of suits; for the more suits, the greater benefit: and another that depends on that, which is contention about jurisdiction; each court drawing to itself, as many causes as it can. But in offices of execution there are not those inconveniences; because their employment cannot be increased by any endeavour of their own. And thus much shall suffice for the nature of punishment and reward; which are, as it were, the nerves and tendons, that move the limbs and joints of a commonwealth.