“There is a useful sorrow, and a destructive sorrow. Sorrow is useful when we weep for our sins, and for our neighbour’s ignorance, and so that we may not relax our purpose to attain to true goodness, these are the real kinds of sorrow. Our enemy adds something to this. For he sends sorrow without reason, which is something called lethargy. We ought always to drive out a sadness like that with prayers and psalms.”