Dear Gardenswithkids,
That’s an excellent question! The difference is that the person in dryness does persist with their customary spiritual exercises, even though they obtain no sensible pleasure, where the slothful abandons them when they see no benefit. When I mentioned awhile ago that the condition becomes worse for a slothful person, it is because they neglect prayer for so long a period, that it becomes increasingly difficult to return to it without a very strong determination of will.
**One of the signs that God is moving the soul to another prayer form is often their feeling of repugnance and dryness when they engage in it. For instance, I remember being very disquieted with reciting my vocal prayers (those words of others that are recited from a prayer book or leaflet). When I went to confession and spoke to the priest about it, he suggested using affective prayer of the heart such as simple ejaculations, and then staying with the Lord in quiet rest for as long as the impulse lasts. **
It was just what the doctor ordered! But a person has to grow into these prayer forms and come of age. A beginner would find this type of prayer very difficult. The same with our spiritual reading. If we find it to be dry and not nourishing our heart to love or growth in virtue, we need to change books, after asking the Lord to lead us through our desires. He seems to make us feel a questioning in some area, in order that we may search out references for the answer.
The only exception to all of this is that if a person has obligated himself through his vocation to pray the Liturgy of the Hours, whether or not this is “enjoyable” sensually, it should not be laid aside. Some third order people have this as part of their rule of life. Nor should mental prayer (conversation from the heart with God) be abandoned unless we want to become dry as a bone.
May God draw you ever closer to Himself,
Carole