Anyway, that poem is from a book entitled "The Secret of the Rosary" by St. Louis De Montfort and the words I posted were written by Blessed Alan de la Roche. Actually there is more to it and here it is.
Blessed Alan de la Roche says: "Let everyone who loves you, oh most holy Mar, listen to this and drink it in: (then the poem)
Blessed Alan continues..."For the sweetness of this blessed salutation is so great that there are no words to explain it adequaltely, and even when its wonders have been sung, we still find it so full of mystery and so profound that the depths can never be plumbed. It has but few ords but is exceeding rich in mystery; it is sweeter than honey and more precious than gold. We should often meditate upon it in our hearts and have it ever upon our lips so as to say it devoutly again and again." Blessed Alan was speaking of the Hail Mary.