"Ilm talabi uchun to'rtta «kof» kerak: ya'ni, kisai padar, kosai modar, kashishi ustoz, ko'shishi shogird".
Otaning nafaqasi, onaning parvarishi, ustozning e'tibori, shogirdning harakati
"Sohilsiz dengiz" kitobidan
-----
Shukurki, 3 ta kof ham bor ekan, 4-kofda astoydil bo'lsak bas.