Kitap 1
1254a
Now the tools mentioned are instruments of production, whereas an article of property is an instrument of actioni.e. with it we do not make something but do something (e.g. wear a dress, lie in a bed).; for from a shuttle we get something else beside the mere use of the shuttle, but from a garment or a bed we get only their use. And also inasmuch as there is a difference in kind between production and action, and both need tools, it follows that those tools also must possess the same difference. But life is doing things, not making things; hence the slave is an assistant in the class of instruments of action.
1254a
And the term article of property is used in the same way as the term part: a thing that is a part is not only a part of another thing but absolutely belongs to another thing, and so also does an article of property. Hence whereas the master is merely the slave’s master and does not belong to the slave, the slave is not merely the slave of the master but wholly belongs to the master.