Aesthetic is related to Pleasant. Pleasant is related to Smile. Smile is related to Frown. Frown is related to Sad. 
Surprise is a different concept from Know. Known is a form of Know. 
Aesthetic <--RelatedTo--> Pleasant <--RelatedTo--> Smile <--RelatedTo--> Frown <--RelatedTo--> Sad 
Surprise <--DistinctFrom--> Know <--FormOf-- Known 