井蛙は以って海を語る可からずせいあはもってうみをかたるべからずことわざa frog in the well cannot understand the ocean even if it is explained to ita narrow-minded person cannot understand the ways of the world
嘉肴ありと雖も食らわずんばその旨きを知らずかこうありといえどもくらわずんばそのうまきをしらずことわざone cannot know the abilities of a great man without putting him to useone cannot know the delicious taste of fine food without eating it