He who is only an athlete is too crude, too vulgar, too much a savage. He who is a scholar only is too soft, to effeminate. The ideal citizen is the scholar athlete, the man of thought and the man of action.

[spiros]

He who is only an athlete is too crude, too vulgar, too much a savage. He who is a scholar only is too soft, to effeminate. The ideal citizen is the scholar athlete, the man of thought and the man of action.
(supposedly by Plato)
https://www.reddit.com/r/classics/comments/10etkwc/quote_from_plato/?rdt=54721

adaptation of a bigger chunk of Plato's Republic, probably: Not too Hard or Too Soft: Plato Likes His Citizens Just Right – SENTENTIAE ANTIQUAE

ὅτι οἱ μὲν γυμναστικῇ ἀκράτῳ χρησάμενοι ἀγριώτεροι τοῦ δέοντος ἀποβαίνουσιν, οἱ δὲ μουσικῇ μαλακώτεροι αὖ γίγνονται ἢ ὡς κάλλιον αὐτοῖς –> those who have submitted to constant athletic training end up wilder than is necessary and those devoted to music become accordingly more effeminate than would be good for them, the devotees of unmitigated gymnastics turn out more brutal than they should be and those of music softer than is good for them