"Deep symbolism" refers to the use of certain objects, actions, or images to represent deeper ideas or emotions. It is when something carries a hidden or profound meaning beyond its literal interpretation. Full definition
Cotard begins an affair with a woman he works with named Hazel (Morton), but she has recently bought a home perpetually on fire (yes, really deep symbolism there). (thecriticalcritics.com)
Like stock imagery, these patterns teeter on the edge between deep symbolism and an emptiness of meaning. (sfaq.us)
The sign of the cross fulfills and renews the deepest symbolism in the sign of Cain. (religion-online.org)