I personally don't have a problem with the idea of being washed in the Blood of the Lamb... I mean, we do eat and drink His Body and Blood

though of course in substance not accidents.
But I was looking around for lyrics from the songs AMDG posted about, and found some with really questionable theology.. such as 'Ashes' or 'Anthem' or even 'Lord of the Dance' which I admit I don't understand. Then there is "Gather us in" which seems to critique churches and Heaven.
Maybe it's just me... but all the emphasis on dancing, singing to mountains & seas, gathering together, rising from the ashes, feeling good about ourselves, and also some of the melodies - there's just something about it that doesn't seem suited for the Sacrifice of the Mass. It's too "us" centered. I don't want to just criticize. But some of the songs either sound theologically shallow or borderline new agey. I get what they were trying to do, I just don't know if I see it the same way. If we were singing about mountains or seas to honour God as Creator, that would be different...
Then I looked up some English translations of Latin chants......
1. O Virgin Mother of God,
He Whom the whole world does not contain,
enclosed Himself in thy womb,
being made man.
2. True faith in thy begotten Son
has cast out the sins of the world,
and for thee virginity
remains inviolate.
3. Thou art the Mother of divine love,
Thou the aiding power the world cries out to:
come in aid, O blessed one,
to thy servants.
4. Great glory be to the Father,
equal glory to the Son,
great glory to God the Holy Spirit.
Amen.
Obviously it flows better in Latin. But it actually has theology and beauty to it.
Or this English from Latin translation:
1. O Heart, Thou ark containing the Law, not of the old servitude,
but of grace, and indulgence, and also of mercy.
2. O Heart, Thou spotless sanctuary of the new covenant,
Thou Temple, holier than the ancient one, And Veil, more profitable than that torn of old.
3. Charity willed Thee to be wounded; by the spear thrust opened,
that we might venerate the wounds of an invisible love.
4. Under this symbol of love, having suffered bloody and mystical torments,
Christ the Priest offered each in sacrifice.
5. Who would not love in turn the One so loving him? Who, being thus redeemed, would not love,
and choose eternal dwellings in this Heart?
6. O Jesus, to Thee be glory, Who pourest grace from Thy heart,
with the Father and the loving Spirit unto everlasting ages.
Amen.
If people were to say or sing this wouldn't it help them to obtain conversion?
There's nothing in those songs about us except that we need to turn to Jesus and Mary.