Moreover, they ratify and confirm all these with the powers of diverse Intelligences, through the sacred ceremonies of religions. The order and proce… - Heinrich Cornelius Agrippa

The supercilious censors will object against the Sybils, holy Magicians and the Gospel itself sooner than receive the name of Magic into favor. So conscientious are they that neither Apollo nor all the Muses, nor an angel from heaven can redeem me from their curse. Whom therefore I advise that they read not our writings, nor understand them, nor remember them. For they are pernicious and full of poison; the gate of Acheron is in this book; it speaks stones—let them take heed that it beat not out their brains. But you that come without prejudice to read it, if you have so much discretion of prudence as bees have in gathering- honey, read securely, and believe that you shall receive no little profit, and much pleasure; but if you shall find any things that may not please you, let them alone and make no use of them, for I do not approve of them, but declare them to you. But do not refuse other things, for they that look into the books of physicians do, together with antidotes and medicines, read also of poisons,

(after writing this book, Agrippa sent it to Trithemius, who after reading the manuscript and then answered Agrippa)

John Trithmius...to Henry Cornelius Agrippa... Your work, most renowned Agrippa, entitled Of Occult Philosophy, which you have sent by this bearer to me, has been examined. With how much pleasure I received it no mortal tongue can express nor the pen of any write. I wondered at your more than vulgar learning—that you, being so young, should penetrate into such secrets as have been hid from most learned men; and not only clearly and truly but also properly and elegantly set them forth... Your work, which no learned man can sufficiently commend, I approve of. Now that you may proceed toward higher things, as you have begun, and not suffer such excellent parts of wit to be idle, I do, with as much earnestness as I can, advise, entreat and beseech you that you would exercise yourself in laboring after better things, and demonstrate the light of true wisdom to the ignorant...