Origen on Allegorical interpretation of the Bible

“The reason why all those we have mentioned hold false opinions and make impious or ignorant assertions about God appears to be nothing else but this, that scripture is not understood in its spiritual sense, but is interpreted according to the bare letter.”

“As for the apostolic epistles, what person who is skilled in literary interpretation would think them to be plain and easily understood, when even in them there are thousands of passages that provide, as it through a window, a narrow opening leading to multitudes of the deepest thoughts?”

“When, therefore, as will be clear to those who read, the passage as a connected whole is literally impossible, whereas the outstanding part of it is not impossible but even true, the reader must endeavor to grasp the entire meaning, connecting by an intellectual process the account of what is literally impossible with the parts that are not impossible but historically true, these being interpreted allegorically in common with the part which, so far as the letter goes, did not happen at all. For our contention with regard to the whole of divine scripture is that it all has a spiritual meaning, but not all a bodily meaning; for the bodily meaning is often proved to be an impossibility.”

“One must therefore portray the meaning of the sacred writings in a threefold way upon one's own soul, so that the simple person may be edified by what we may call the flesh of the scripture, this name being given to the obvious interpretation; while the one who has made some progress may be edified by its soul, as it were; and the one who is perfect and like those mentioned by the apostle: "We speak wisdom among the perfect; yet a wisdom not of this world, nor of the rulers of this world, which are coming to nought; but we speak God's wisdom in a mystery, even the wisdom that has been hidden, which God foreordained before the world unto our glory" (1 Cor. 2:6-7)--this one may be edified by the spiritual law, which has "a shadow of the good things to come" (cf. Rom. 7:14). For just as the human being consists of body, soul and spirit, so in the same way does the scripture, which has been prepared by God to be given for humanity's salvation.”