Thomas Aquinas,
Summa Theologiae — Question 31 - OF DELIGHT CONSIDERED IN ITSELF…
“ But because it is proper to man to apprehend knowledge itself as something good, it follows that the former pleasures of the senses, i.e. those which arise from knowledge, are proper to man: whereas pleasures of the senses, as loved for their usefulness, are common to all animals.If therefore we speak of that sensible pleasure by which reason of knowledge, it is evident that the sight affords greater pleasure than any other sense. On the other hand, if we speak of that sensible pleasure which is by reason of usefulness, then the greatest pleasure is afforded by the touch. ”
