> "But a certain difference is found among ends (telôn); some are activities (energeiai), others are products (erga) apart from the activities that produce them. Where there are ends apart from the actions (praxeis), it is the nature of the products (erga) to be better than the activities (energeiôn)." (Ross)
>

"Every art and every inquiry, and similarly every action and pursuit, is thought to aim at some good;"

So Aquinas understands pure activities as actions, and those with products as arts (technê).

Still this is not the only possible reading of Aristotle here. Sarah Broadie, in her NE commentary, thinks that the distinction could very well be within kinds of technê:
"In some, the end is the activity that constitutes exercise of the expertise (so riding stands to horsemanship); in others, the end is a product which survives the activity (so bridles to the bridle-making skill)."

Well, Aristotle is so unspecific here that quite different understandings of his text are possible...
Thomas


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