Theoretical is the opposite of Active. Active is related to Listen. 
Bless is related to Religious. Religious is related to Prayer. Prayer is related to Grace. Grace is a synonym of Thanksgiving. 
Theoretical <--Antonym--> Active <--RelatedTo--> Listen 
Bless <--RelatedTo--> Religious <--RelatedTo--> Prayer <--RelatedTo--> Grace <--Synonym--> Thanksgiving 