Mr. Heathcliff, I believe, had not treated him physically ill; thanks to his fearless nature, which offered no temptation to that course of oppression: he had none of the timid susceptibility that would have given zest to ill-treatment, in Heathcliff's judgment. 
Mr. Heathcliff, I believe, had not treated him physically ill, thanks to his fearless nature: he had none of the timidity that would have tempted Heathcliff to mistreat him.
