[191] For when, being under the influence of some philosophical speculations, you are allured onwards, then the mind follows this, and forgets all the other things which concern its corporeal abode; and if the external senses prevent it from arriving at an accurate sight of the objects of the intellect, then those who are fond of contemplation take care to diminish the impetuosity of its attack, for they close their eyes and stop up their ears, and check the rapid motion of the other organ, and choose to abide in tranquillity and darkness, that the eye of the soul, to which God has granted the power of understanding the objects of the intellect, may never be overshadowed by any of those objects appreciable only by the outward senses.