Those who are imaged are real and help us

With the material picture before our eyes we see the invisible God through the visible representation, and glorify Him as if present, not as a God without reality, but as God who is the essence of being. Nor are the saints whom we glorify fictitious. They are in being, and are living with God; and their spirits being holy, they help, by the power of God, those who deserve and need their assistance.

St. John Damascene
Apology Against Those Who Decry Holy Images
Part III, Quote from Simeon of Mount Thaumastus

We do not worship images

We, who are of the faithful, do not worship images as gods, as the heathens did, God forbid, but we mark our loving desire alone to see the face of the person represented in image.

St. John Damascene
Apology Against Those Who Decry Holy Images
Part III, Quoted from St. Athanasius Answers to Antiochus

Feelings for someone can be expressed through their images

When the Devil say man made after God’s image and likeness, as he could not fight against God, he vented his wickedness on the image of God. In the same way an angry man might stone the King’s image, because he cannot stone the King, striking the wood which bears his likeness.

St. John Damascene
Apology Against Those Who Decry Holy Images
Part III, Quote form St. Basil’s Commentary on Isaiah

God’s holy ones are worshipped as partakers of the divine nature

And “God stood in the synagogue of the gods; in the midst of it He points out the gods.” (Ps. 82.1) As, then, they are truly gods, not by nature, but as partakers of God’s nature, so they are to be worshipped, not as worshipful on their own account, but as possessing in themselves Him who is worshipful by nature. Just in the same way iron when ignited is not by nature hot and burning to the touch, it is the fire which makes it so. They are worshipped as exalted by God, as through Him inspiring fear to His enemies, and becoming benefactors to the faithful. It is love of God which gives them their free access to Him, not as gods or benefactors by nature, but as servants and ministers of God. We worship them, then, as the king is honoured through the honour given to a loved servant. He is honoured as a minister in attendance upon his master— as a valued friend, not as king. The prayers of those who approach with faith are heard, whether through the servant’s intercession with the king, or whether through the king’s acceptance of the honour and faith shown by the servant’s petitioner, for it was in his name that the petition was made. Thus, those who approached through the apostles obtained their cures. Thus the shadow, and winding-sheets, and girdles of the apostles worked healings. (Acts 5.15) Those who perversely and profanely wish them to be adored as gods are themselves damnable, and deserve eternal fire. And those who in the false pride of their hearts disdain to worship God’s servants are convicted of impiety towards God. The children who derided and laughed to scorn Elisseus bear witness to this, inasmuch as they were devoured by bears. (II Kgs. 2.23)

…I venerate and worship angels and men, and all matter participating in divine power and ministering to our salvation through it.

…No one should be worshipped as God except the one true God. Whatever is due to all the rest is for God’s sake.

St. John Damascene
Apology Against Those Who Decry Holy Images
Part III, What We Find Worshipped in Scripture

Venerating the cross is the same as venerating an image

If I worship the image of the Cross, made of whatever wood it may be, shall I not worship the image which shows me the Crucified and my salvation through the Cross? Oh, inhumanity of man! It is evident that I do not worship matter, for supposing the Cross, if it be made of wood, should fall to pieces, I should throw them into the fire, and the same with images.

St. John Damascene
Apology Against Those Who Decry Holy Images
Part II

There are many unwritten traditions that are handed down

The eye-witnesses and ministers of the word handed down the teaching of the Church, not only by writing, but also by unwritten tradition. Whence comes our knowledge of the sacred spot, Mount Calvary, of the holy sepulchre? Has it not been handed down to us from father to son? It is written that our Lord was crucified on Calvary, and buried in the tomb which Joseph hewed out of the rock, but it is unwritten tradition that teaches us we are adoring the right places, and many other things of the same kind. Why do we believe in three baptisms, that is, in three immersions? Why do we adore the Cross? Is it not through tradition? Therefore the holy apostle says: “Brethren, stand fast; and hold the traditions which you have learned, whether by word, or by our epistle.” (II Thess. 2.15) Many things, therefore, being handed down to the Church by unwritten tradition and kept up to the present day, why do you speak slightingly of images?

I am not to be persuaded that the Church is set in order by imperial edicts, but by patristic traditions, written and unwritten. As the written Gospel has been preached in the whole world, so has it been an unwritten tradition in the whole world to represent in image Christ, the incarnate God, and the saints, to adore the Cross, and to pray towards the east.

St. John Damascene
Apology Against Those Who Decry Holy Images
Part II

The Saints are deserving of honor

For if the friends of Christ are heirs of God and co-heirs of Christ, and are to be partakers of the divine glory and kingdom, is not even earthly glory due to them? I call you not servants, our Lord says; you are my friends. Shall we, then, withhold from them the honor which the Church gives them?

St. John Damascene
Apology Against Those Who Decry Holy Images
Part II

Iconoclasm requires one to follow the whole law, and therefore fall from grace

If you give up images on account of the law, you should also keep the Sabbath and be circumcised, for these are severely inculcated by it…But you must know that if you observe the law, Christ will profit you nothing.

St. John Damascene
Apology Against Those Who Decry Holy Images
Part II

The intention of those who venerate is what’s important

So with regard to images we must manifest the truth, and take into account the intention of those who make them. If it be in very deed for the glory of God and of His saints to promote goodness, to avoid evil, and save souls, we should receive and honour and worship them as images, and remembrances, likenesses, and the books of the illiterate. We should love and embrace them with hand and heart as reminders of the incarnate God, or His Mother, or of the saints, the participators in the sufferings and the glory of Christ, the conquerors and overthrowers of Satan, and diabolical fraud. If any one should dare to make an image of Almighty God, who is pure Spirit, invisible, uncircumscribed, we reject it as a falsehood. If any one make images for the honour and worship of the Devil and his angels, we abhor them and deliver them to the flames. Or if any one give divine honours to the statues of men, or birds, or reptiles, or any other created thing, we anathematise him.

St. John Damascene
Apology Against Those Who Decry Holy Images
Part II