That the inclination we have for sensible pleasures is badly governed is not only the origin of the dangerous mistakes we fall into in moral subjects, and the general cause of the disorder of our morals: it is also one of the principal causes of the disturbance of our minds, and it imperceptibly involves us in very crude, but less dangerous, errors in purely speculative subjects, because this inclinaaion prevents us from bringing to things that do not affect us sufficient attention to understand them and judge well of them.