Jowett: pleasures of the soul

Soc. The fifth class are the pleasures which were defined by us as painless, being the pure pleasures of the soul herself, as we termed them, which accompany, some the sciences, and some the senses. PHILEBUS  

He whose desires are drawn toward knowledge in every form will be absorbed in the pleasures of the soul, and will hardly feel bodily pleasure — I mean, if he be a true philosopher and not a sham one. THE REPUBLIC   BOOK VI