The Scriptures are not clear to all

Then, finally, that the Scriptures were written by the Spirit of God, and have a meaning, not such only as is apparent at first sight, but also another, which escapes the notice of most.  For those (words) which are written are the forms of certain mysteries, and the images of divine things.  Respecting which there is one opinion throughout the whole Church, that the whole law is indeed spiritual; but that the spiritual meaning which the law conveys is not known to all, but to those only on whom the grace of the Holy Spirit is bestowed in the word of wisdom and knowledge.

Origen
On First Principles, Book I
Preface

The Church’s understanding of creation and the end

This also is a part of the Church’s teaching, that the world was made and took its beginning at a certain time, and is to be destroyed on account of its wickedness.  But what existed before this world, or what will exist after it, has not become certainly known to the many, for there is no clear statement regarding it in the teaching of the Church.

Origen
On First Principles, Book I
Preface

The devil is a fallen angel

Regarding the devil and his angels, and the opposing influences, the teaching of the Church has laid down that these beings exist indeed; but what they are, or how they exist, it has not explained with sufficient clearness.  This opinion, however, is held by most, that the devil was an angel, and that, having become an apostate, he induced as many of the angels as possible to fall away with himself, and these up to the present time are called his angels.

Origen
On First Principles, Book I
Preface

Origen is not sure on the origin of the soul

But with respect to the soul, whether it is derived from the seed by a process of traducianism, so that the reason or substance of it may be considered as placed in the seminal particles of the body themselves, or whether it has any other beginning; and this beginning, itself, whether it be by birth or not, or whether bestowed upon the body from without or no, is not distinguished with sufficient clearness in the teaching of the Church.

Origen
On First Principles, Book I
Preface

The soul is judged according to its works

After these points, also, the apostolic teaching is that the soul, having a substance and life of its own, shall, after its departure from the world, be rewarded according to its deserts, being destined to obtain either an inheritance of eternal life and blessedness, if its actions shall have procured this for it, or to be delivered up to eternal fire and punishments, if the guilt of its crimes shall have brought it down to this:  and also, that there is to be a time of resurrection from the dead, when this body, which now “is sown in corruption, shall rise in incorruption,” and that which “is sown in dishonour will rise in glory.”  This also is clearly defined in the teaching of the Church, that every rational soul is possessed of free-will and volition; that it has a struggle to maintain with the devil and his angels, and opposing influences, because they strive to burden it with sins; but if we live rightly and wisely, we should endeavour to shake ourselves free of a burden of that kind.

Origen
On First Principles, Book I
Preface

The Son and the Spirit are also God

Jesus Christ Himself, who came (into the world), was born of the Father before all creatures; that, after He had been the servant of the Father in the creation of all things—“For by Him were all things made”—He in the last times, divesting Himself (of His glory), became a man, and was incarnate although God, and while made a man remained the God which He was; that He assumed a body like to our own, differing in this respect only, that it was born of a virgin and of the Holy Spirit:  that this Jesus Christ was truly born, and did truly suffer, and did not endure this death common (to man) in appearance only, but did truly die; that He did truly rise from the dead; and that after His resurrection He conversed with His disciples, and was taken up (into heaven).

Then, Thirdly, the apostles related that the Holy Spirit was associated in honour and dignity with the Father and the Son.  But in His case it is not clearly distinguished whether He is to be regarded as born or innate, or also as a Son of God or not:  for these are points which have to be inquired into out of sacred Scripture according to the best of our ability, and which demand careful investigation.  And that this Spirit inspired each one of the saints, whether prophets or apostles; and that there was not one Spirit in the men of the old dispensation, and another in those who were inspired at the advent of Christ, is most clearly taught throughout the Churches.

Origen
On First Principles, Book I
Preface

Apostolic tradition “alone” is the source of authority

…as the teaching of the Church, transmitted in orderly succession from the Apostles, and remaining in the Churches to the present day, is still preserved, that alone is to be accepted as truth which differs in no respect from ecclesiastical and apostolical tradition.

Origen
On First Principles, Book I
Preface

Grace and truth were obtained through Christ

All who believe and are assured that grace and truth were obtained through Jesus Christ, and who know Christ to be the truth, agreeably to His own declaration, “I am the truth,” derive the knowledge which incites men to a good and happy life from no other source than from the very words and teaching of Christ.

Origen
On First Principles, Book I
Preface

God-Christ will judge according to works and then the millenium begins

Ye who are to be inhabitants of the heavens with God-Christ, hold fast the beginning, look at all things from heaven.  Let simplicity, let meekness dwell in your body.  Be not angry with thy devout brother without a cause, for ye shall receive whatever ye may have done from him.  This has pleased Christ, that the dead should rise again, yea, with their bodies; and those, too, whom in this world the fire has burned, when six thousand years are completed, and the world has come to an end.  The heaven in the meantime is changed with an altered course, for then the wicked are burnt up with divine fire.  The creature with groaning burns with the anger of the highest God.  Those who are more worthy, and who are begotten of an illustrious stem, and the men of nobility under the conquered Antichrist, according to God’s command living again in the world for a thousand years, indeed, that they may serve the saints, and the High One, under a servile yoke, that they may bear victuals on their neck.  Moreover, that they may be judged again when the reign is finished.  They who make God of no account when the thousandth year is finished shall perish by fire, when they themselves shall speak to the mountains.  All flesh in the monuments and tombs is restored according to its deed:  they are plunged in hell; they bear their punishments in the world; they are shown to them, and they read the things transacted from heaven; the reward according to one’s deeds in a perpetual tyranny.

Commodianus
Instructions of Commodianus
Chapter LXXX