"The Society that separates its scholars from its warriors will have its thinking done by cowards and its fighting done by fools." —Thucydides
Socrates was famous in Athens for his distinguished military service: https://donaldrobertson.name/2017/01/03/socrates-the-soldier/
This is an awesome quote that is often misattributed to Thucydides but actually from Sir William Francis Butler's, "Charles George Gordon" (1889), p. 85 https://en.wikiquote.org/wiki/Thucydides and https://books.google.com/books?id=i6dCAAAAYAAJ&pg=PA85&dq=cowards+fools+inauthor:William+inauthor:Francis+inauthor:Butler&hl=en&sa=X&ei=UQjKULnhMc200QHQ1oD4Bw#v=onepage&q=cowards%20fools%20inauthor%3AWilliam%20inauthor%3AFrancis%20inauthor%3AButler&f=false