Two serious evils…

In order that what we have said may be the more clearly and fully understood, it will be well to set down here and state how these desires are the cause of two serious evils in the soul: the one is that they deprive it of the Spirit of God, and the other is that the soul wherein they dwell is wearied, tormented, darkened, defiled and weakened
–Saint John of the Cross (1542-1591)