A description of accidie, and the way in which it creeps over the heart of a monk, and the injury it inflicts on the soul.
And when this has taken possession of some unhappy soul, it produces dislike of the place, disgust with the cell, and disdain and contempt of the brethren who dwell with him or at a little distance, as if they were careless or unspiritual. It also makes the man lazy and sluggish about all manner of work which has to be done within the enclosure of his dormitory. It does not allow him to stay in his cell, or to take any pains about reading, and he often groans because he can do no good while he stays there, and complains and sighs because he can bear no spiritual fruit so long as he is joined to that society; and he complains that he is cut off from spiritual gain, and is of no use in the place, as if he were one who, though he could govern others and be useful to a great number of people, yet was edifying none, nor profiting any one by his teaching and doctrine. He cries up distant monasteries and those which are a long way off, and describes such places as more profitable and better suited for salvation; and besides this he paints the intercourse with the brethren there as sweet and full of spiritual life. On the other hand, he says that everything about him is rough, and not only that there is nothing edifying among the brethren who are stopping there, but also that even food for the body cannot be procured without great difficulty. Lastly he fancies that he will never be well while he stays in that place, unless he leaves his cell (in which he is sure to die if he stops in it any longer) and takes himself off from thence as quickly as possible. Then the fifth or sixth hour brings him such bodily weariness and longing for food that he seems to himself worn out and wearied as if with a long journey, or some very heavy work, or as if he had put off taking food during a fast of two or three days. Then besides this he looks about anxiously this way and that, and sighs that none of the brethren come to see him, and often goes in and out of his cell, and frequently gazes up at the sun, as if it was too slow in setting, and so a kind of unreasonable confusion of mind takes possession of him like some foul darkness, and makes him idle and useless for every spiritual work, so that he imagines that no cure for so terrible an attack can be found in anything except visiting some one of the brethren, or in the solace of sleep alone.
— Book X, ch. 2 of The Twelve Books of John Cassian on the Institutes of the Coenobia, and the Remedies for the Eight Principal Faults (tr. Gibson)