At one time I used to meet rather sad men who seemed not very talented at anything who would tell me that their prayer group had prayed and it seemed as if God had chosen them to have "a music ministry". Invariably this menat that the poor individual would then sing with great gusto and strum his guitar's three chords on every occassion, never improving.
Lately I have met a few people who tell me they have "a prayer ministry" and on occassion I have met people who received the services of someone's "prayer ministry". Now, all Christians are called to pray and to pray for others. I would delight in someone saying rosaries and the psalter, especially the penitential psalms for me or offer the Holy Communion for me and devote a couple of hours before the Blessed Sacrament for me, if they were to offer up sufferings and undertake various other acts of penance, I would be thrilled. That would be a real prayer ministry.
But terms like "prayer ministry" seem to be about a power relationship, where someone who claims a certain charismatic power excercises it over someone who seems to be in need or simply someone they determine is in need.
To me it seems profoundly un-Catholic. I am not sure what happened in the dim and distant past. I don't know how the ancient ministry of exorcist operated. The Catholic Church has always stressed that the prime actor in its rites is always Christ, never the individual minister, hence the insistance on "doing the red and saying the black". This is actually an important theological isssue that the Church has safeguarded down the centuries. The priest or other minister is God's servant, God is certainly not his.
There is a real pastoral danger, of spiritual abuse, in what is often spoken of as "prayer ministry" or as it often becomes "deliverance ministry".
"I just want to bring before you, Lord, X who is suffering from the spirit of Z", has so many tightly packed theological, spiritual, psychological and emotional implications. For its Sacred Ministers at least within its rites the Church forbids ancd condemns this type of thing, yet it is very prevalent amongst many charismatic lay people, religious, hospital, even school chaplains, extra-ordinary ministers of Holy Communion.
I heard recently of a female religious with "prayer ministry" who seemed to be using her own version of the Rite of Exorcism, forbidden to anyone but the diocesan exorcist. I don't know what effect it had on her subjects but she seemed rather damaged by what she had been doing. This stuff doesn't come from the Catholic Church, it is entirely Protestant and very dangerous.