Hi, this is a very interesting question. In The Theory of Moral Sentiments, Adam Smith argues that the person who commands our highest admiration is one who combines perfect virtue with perfect self-command.
Smith argues that this person has the ability to regulate their feelings and reactions appropriately in all circumstances without being overwhelmed by passion or remaining cold/indifferent, and while acting with benevolence, justice, and propriety. This person feels emotions at the right intensity, at the right time, and toward the right objects, always guided by what the so-called "impartial spectator" would approve of.
Why do we most admire this kind of person? According to Smith, this person can maintain their composure under extreme adversity, such as under suffering, injustice, or loss, and is able to continue to act virtuously. This person represents the highest form of human character because it demonstrates complete harmony between feeling, judgment, and action.
To be sure, Smith acknowledges that such perfect virtue is extremely rare--almost godlike--which is why it commands such profound admiration when we encounter or even imagine it.
Hope this helps answer your question!
