Optimistic is related to Positive. Positive is related to Blood. Blood is related to Dna. 
Behavior is related to Sin. Sin is related to Sympathy. Sympathy is related to Give. Give is related to Return. 
Optimistic <--RelatedTo--> Positive <--RelatedTo--> Blood <--RelatedTo--> Dna 
Behavior <--RelatedTo--> Sin <--RelatedTo--> Sympathy <--RelatedTo--> Give <--RelatedTo--> Return 