An idealist.
Someone who supports or creates abstract art.
Related or tending to abstractionism, particularly art.
One who believes, or is an initiate, in esoteric doctrines or rites.
An esoteric doctrine or treatise; esoteric philosophy.
Having to do with concepts that are highly theoretical and without obvious practical application; often with mystical or religious connotations.
Confidential; private.
Intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle.