To suppose a man to be of a good disposition, and at the same time likely, in virtue of that very disposition, to engage in an habitual train of mischievous actions, is a contradiction in terms: nor could such a proposition ever be advanced, but from the giving, to the thing which the word disposition is put for a reality which does not belong to it. If then, for example, a man of religious disposition should, in virtue of that very disposition, be in the habit of doing mischief, for instance, by persecuting his neighbours, the case must be, either that his disposition, though good in certain respects, is not good upon the whole: or that a religious disposition is not in general a good one.

IPML Chapter 11 Section 1