Seneca,
Moral letters to Lucilius — Letter 84…
“ And reading, I hold, is indispensable – primarily, to keep me from being satisfied with myself alone, and besides, after I have learned what others have found out by their studies, to enable me to pass judgment on their discoveries and reflect upon discoveries that remain to be made. Reading nourishes the mind and refreshes it when it is wearied with study; nevertheless, this refreshment is not obtained without study. 2. We ought not to confine ourselves either to writing or to reading; the one, continuous writing, will cast a gloom over our strength, and exhaust it ”
