A word for something that is deeper, more compelling than what is obvious or visible

Question

Is there a word to describe the quality of something that is deeper, more substantial, or more compelling than what is obvious or originally thought?

I am thinking of something abstract, like a thought or something philosophical like Ursula K. Le Guin's definition of communication.

Something "unexpectedly complex" would warrant deeper thought...not necessarily making it compelling, but perhaps leading to other considerations worthy of more attention. — Tom22, Commented Jul 10, 2017 at 4:06
'Deceptively profound' -- not obviously, but deceptively profound. It sounds simple but has layers of complex meaning. — English Student, Commented Jul 10, 2017 at 7:34
I like the word rich here, which if necessary could be combined with "surprisingly" or something similar. — Steve Lovell, Commented Jul 10, 2017 at 7:36

English Student · Accepted Answer · 2017-07-10 07:52:28Z

(Deceptively) profound -- not obviously, but deceptively profound. It sounds simple but has layers of complex meaning.

Profound adjective (of a person or statement) having or showing great knowledge or insight.

Also read: ['deceptively' usage -- an earlier question and answers here at English.StackExchange.com] How should "deceptively" actually be used?

Example (mine) Professor B's lecture on the 'interconnectedness of experience' was deceptively profound.

Option 2: understated wisdom.

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