Author is related to Person. Person wants (to) Confident. Confident is a synonym of Positive. 
Unusual is similar to Different. Different is similar to Opposite. Opposite is similar to Other. 
Author <--RelatedTo--> Person --Desires--> Confident <--Synonym--> Positive 
Unusual <--SimilarTo--> Different <--SimilarTo--> Opposite <--SimilarTo--> Other 