The idea is here that there is an ‘expression’ for everything, that we know what it means ‘to express something’, ‘to describe something’. Here is a feeling, an experience, & now I could say to someone “express it!”. But what is to be the relation of the expression to what it expresses? In what way is this expression the expression of this feeling rather than another?! One is inclined to say “we mean this feeling by this expression”, but what is meaning a feeling by a word like? Is this quite clear if, e.g., I have explained what ‘meaning this person by the name ‘N’’ is like?