This poem is from the series The Mayfair Witches which was written by Anne Rice

One will rise who is too evil.
One will rise who is too good.
Twixt the two a witch shall falter and therby open wide the door.
Pain and suffering as they stumble Blood and fear before they learn.
Woe betide this Springtime Eden
Now the vale of those who mourn.
Beware the watchers in that hour bar the doctors from the house
Scholars will but nourish evil Scientists would raise it high.
Let the devil speak his story
Let him rouse the angels might
Make the dead come back to witness
Put the alchemist to flight.
Slay the flesh that is not human
Trust to weapons crude and cruel For, dying on the verge of wisdom,
Tortured souls may seek the light.
Crush the babes who are not children
Show no mercy to the pure
Else shall Eden have no Springtime.
Else shall our kind reign no more.

Ancient Evelyn Mayfair -from Anne Rice Lasher