with our senses: we did not acquire the faculty of sight or hearing by repeatedly seeing or repeatedly listening, but the other way about—because we had the senses we began to use them, we did not get them by using them. The virtues on the other hand we acquire by first having actually practised them, just as we do the arts. We learn an art or craft by doing the things that we shall have to do when we have learnt it ^a: for instance, men become builders by building houses, harpers by playing on the harp. Similarly we become just by doing just acts, temperate by doing temperate acts, brave by 5doing brave acts. This truth is attested by the experience of states: lawgivers make the citizens good by training them in habits of right action—this is the aim of all legislation, and if it fails to do this it is a failure; this is what distinguishes a good 6form of constitution from a bad one. Again, the actions from or through which any virtue is produced are the same as those through which it also is destroyed—just as is the case with skill in the arts, for both the good harpers and the bad ones are produced by harping, and similarly with builders and all the other craftsmen: as you will become a good builder from building well, so you will become 7a bad one from building badly. Were this not so, there would be no need for teachers of the arts, but everybody would be born a good or bad craftsman as the case might be. The same then is true of the virtues. It is by taking part in transactions with our fellow-men that some of us become just and others unjust; by acting in dangerous situations and forming a habit of fear or of confidence we