Thomas Aquinas, Compendium of Theology

Clearly, therefore, they are in error who seek happiness in various things outside of God. Some look for happiness in carnal pleasures, which are shared even by brute animals. Others seek happiness in wealth, which is rightly directed to the sustenance of those who have such possessions; this is an end common to every created being. Others place their happiness in power, which is ordained to the communication of one's own perfection to others; this, too, we said, is common to all beings. Yet others seek happiness in honors or reputation, which are due to a person because of the end he has already reached, or because of the noble dispositions which equip him to reach an end. Finally, happiness does not consist in the knowledge of any created things whatever, even though they may be far above man; for man's desire comes to rest in the knowledge of God alone.