Meaning of esoteric

1. The professor's lecture on quantum physics was so esoteric that only a few students were able to understand it.
2. I love reading esoteric books on ancient mysticism and hidden knowledge.
3. The artist's work was filled with esoteric symbolism that left many viewers puzzled.
4. The cult's beliefs were so esoteric that outsiders found them difficult to comprehend.
5. The chef's recipe for the dish was so esoteric that it required rare and unusual ingredients.
6. The esoteric rituals of the secret society were shrouded in mystery and intrigue.
7. The philosopher's ideas were considered too esoteric for mainstream acceptance.
8. The composer's music was characterized by its esoteric harmonies and complex structures.
9. The poet's writing was full of esoteric references that required deep knowledge of literature and history to fully appreciate.
10. The psychic claimed to have esoteric knowledge of the future that she could only share with a select few.