Sentence:  Indeed we should say , on the contrary , that the accident of our later discovery made no difference whatever to the badness of the animal 's pain , that it would have been every whit as bad whether a chance passer-by happened later to discover the body and <WSD>feel</WSD> repugnance or not . 
Meaning of the word marked with <WSD> tags:  undergo an emotional sensation or be in a particular state of mind