In pronunciation there are at least two problems - no-one really knows how ancient Greek was pronounced. Some insist that it was a tonal language, but people who speak tonal languages like Swedish point out that 99% of the time the tone coincides with word-stress. Also dialects were formally recognised and played specific literary roles, but that is all we really have left of them - not enough to know how they were pronounced (except in broad terms). Also the dialects tend to get over-exaggerated by their transmitters. Heraclitus was Ionian, as was Herodotus, MSS of whom are often referred to as "hyper-ionicised".
Also, I don't fully understand where that quote came from - some of this fragmentary stuff can be second or third hand and requires you to study the transmission as well as the actual words - it's more likely to be someone paraphrasing Heraclitus than a direct quote.
Anyways, back to bows and arrows. The leader of our uke group is a member of some archery group in Kent. I fancy it, but it's more trouble than it's worth for me to travel out from the part of London I live in. Besides, if I had the money to spend on archery, I'd probably rather spend it on musical instruments or hi-fi!
1975 Calatayud y Gisbert, Yamaha CG131S.