Cicero, de Fato 7-8 [discussing ideas of Chrysippus and Posidonius]
“We observe how much of a difference there is between the characters of various places: some are healthy, others are unhealthy; we see that people in some places are phlegmatic and like people who have too much moisture while others are dried out and thirsty. There are many other significant differences between different places.
Athens has a rare climate from which the residents of Attica are considered to be smarter than others; it is humid at Thebes, and so the Thebans are thick and strong. Nevertheless, that sterling Athenian environments will not ensure that anyone listens to Zeno or Arcesilas or Theophrastus any more than the thick Theban air will prepare someone better to win at Nemea than in Corinth.”
Inter locorum naturas quantum intersit videmus: alios esse salubres, alios pestilentes, in aliis esse pituitosos et quasi redundantes, in aliis exsiccatos atque aridos; multaque sunt alia quae inter locum et locum plurimum differant. Athenis tenue caelum, ex quo etiamacutiores putantur Attici, crassum Thebis, itaque pingues Thebani et valentes. Tamen neque illud tenue caelum efficiet ut aut Zenonem quis aut Arcesilam aut Theophrastum audiat, neque crassum ut Nemea