The suggestion that happiness is some kind of operation, or activity, may seem formidably abstract until we have considered just what kind of activity it may be – and this must wait until we read through the remaining six Articles of Question 3. For now, it may suffice to keep in mind Aristotle’s remark that both ordinary and educated people identify happiness with the activity of living well and doing well. At present St. Thomas simply wants to vindicate that claim; later on he will specify its meaning more fully.