Mass is related to Large. Large is related to Van. Van is related to Deliver. 
you would Contemplate because Wonder. Wonderful is derived from Wonder. Wonderful is the opposite of Terrible. 
Mass <--RelatedTo--> Large <--RelatedTo--> Van <--RelatedTo--> Deliver 
Contemplate --MotivatedByGoal--> Wonder <--DerivedFrom-- Wonderful <--Antonym--> Terrible 