We often think of symbols as always having an external meaning. But the meaning a symbol has is what you give it. And there is an esoteric usage of symbols wherein they are used to express parts of the self through what is generated. In other words, the meanings we generate as a result of making contact with reality, even if wrong, tell us about ourselves.
In this way, by becoming aware of our internal meanings and intuitive data stream, we know ourselves better, which is essential to gaining self-mastery and freedom from enslavement.