Рыбак рыбака видит издалека

People of similar intellect and interests find one another and come to mutual understanding. See Масть к масти подбирается (M), Подобный подобного любит (П)

Var.: Дурак дурака видит издалека. Свояк свояка видит издалека

Cf: Birds of a color flock together (Am.). Birds of a feather flock together (Am., Br.). Each kind attracts its own (Am.). It takes a fool to know a fool (Am.). It takes one to know one (Am.). Like attracts (will to) like (Am., Br.). Like calls to (draws to, knows, likes, seeks, sees) like (Br.). One after kind (Am., Br.). They that know one another salute afar off (Br.). A thief knows a thief, as a wolf knows a wolf (Am., В г.). Water finds its own level (Am., Br.). Water seeks its /own/ level (Am.)