I have to make an idiom/proverb for 'there is more to something than meets the eye' in the context of culture; that often, traditions and customs are just symbolic/representative of bigger things. Could someone help me come up with something that means this?
Tip of the iceberg ( Cambridge Dictionary)
a small, noticeable part of a problem, the total size of which is really much greater:
These small local protests are just the tip of the iceberg.