Apparently, in Calvin’s time, there was a certain fascination with angels and demons. Still today, many books are written toward discovering the unseen operations of angelic beings. Much of the popular demonology works coming out today, not unlike in Calvin’s time, pile speculation on top of speculation, using obscure texts as hermeneutical ‘keys’ for unlocking ‘truths’ long undiscovered.
As Calvin says, in better words, it’s a whole lot easier to talk about how many angels can dance on the head of a needle than what it means for a Christian to see to it that “no root of bitterness” springs up in our hearts (Heb 12:15). Speculative theology is much more interesting and much less, well, intrusive.
Aurelius Augustine spoke of God’s existence in eternity past, before the world was created. Speculative philosophers quipped “Pray tell, what was He doing all that time?” Like R.C. Sproul (where I first heard this classic quote), Dr. Calvin very much enjoyed Augustine’s response.
“It was a shrewd saying of a good old man, who when some one pertly asked in derision what God did before the world was created, answered he made a hell for the inquisitive (Augustine, Confess. lib. 11 c.12). This reproof, not less weighty than severe, should repress the tickling wantonness which urges many to indulge in vicious and hurtful speculation.” -Institutes, 1.14.1
Calvin wanted theology that conformed to the purpose of God’s self-revelation in Scripture – truths that transform the heart and the mind, truths that are profitable … for training in righteousness (2 Tim 3:16-17).
“My care, however, must be to keep within the bound which piety prescribes, lest by indulging in speculations beyond my reach, I bewilder the reader, and lead him away from the simplicity of the faith. And since the Holy Spirit always instucts us in what is useful, but altogether omits, or only touches cursorily on matters which tend little to edification, of all such matters, it certainly is our duty to remain in willing ignorance.” -Institutes, 1.14.3
“Not to dwell on this, let us here remember that on the whole subject of religion one rule of modesty and soberness is to be observed, and it is this: in obscure matters not to speak or think, or even long to know, more than the word of God has delivered. A second rule is, that, in reading the Scriptures, we should constantly direct our inquiries and meditations to those things which tend to edification, not indulge in curiosity, or in studying things of no use. And since the Lord has been pleased to instruct us, not in frivolous questions, but in solid piety, in the fear of his name, in true faith, and the duties of holiness, let us rest satisfied with such knowledge. Wherefore, if we would be duly wise, we must renounce those vain babblings of idle men, concerning the nature, ranks, and number of angels, without any authority from the word of God. I know that many fasten on these topics more eagerly, and take greater pleasure in them than in those relating to daily practice.” -Institutes, 1.14.4
The devil’s created nature:
“But as the devil was created by God, we must remember that this malice which we attribute to his nature is not from creation, but from deprivation. Every thing damnable in him he brought upon himself, by his revolt and fall. Of this Scripture reminds us, lest, by believing that he was so created at first, we should ascribe to God what is most foreign to his nature. For this reason, Christ declares (John 8:44), that Satan, when he lies, “speaketh of his own,” and states the reason, “because he abode not in the truth.”
How far can we probe the matter of how and when Satan became evil?
“But although the expressions are brief and not very explicit, they are amply sufficient to vindicate the majesty of God from every calumny. And what more does it concern us to know of devils? Some murmur because the Scripture does not in various passages give a distinct and regular exposition of Satan’s fall, its cause, mode, date, and nature. But as these things are of no consequence to us, it was better, if not entirely to pass them in silence, at least only to touch lightly upon them.”
What of Satan’s power/authority?
With regard to the strife and war which Satan is said to wage with God, it must be understood with this qualification, that Satan cannot possibly do anything against the will and consent of God…. [the testing of Job, Ahab's deception, tormented King Saul, plagues of Egypt] It is evident therefore that Satan is under the power of God, and is so ruled by His authority, that he must yield obedience to it. Moreover, though we say that Satan resists God, and does works at variance with his works, we at the same time maintain that this contrariety and opposition depend on the permission of God… This much, therefore, he has of himself, and his own iniquity, that he eagerly, and of set purpose, opposes God, aiming at those things which he deems most contrary to the will of God. But as God holds him bound and fettered by the curb of his power, he executes those things only for which permission has been given him, and thus, however unwilling, obeys his Creator, being forced, whenever he is required, to do him service.” -Institutes, 1.14.17

