An icon is a symbol of the invisible. It depicts not only the outward, visible countenance of the Lord and His saints, but also their inner likeness, their sanctity.
And the opinion, extremely popular in our times, that 'it's all the same which church you go to; after all, God is one' is in agreement with this tendency. Yes! God is one, but, you know, He also gave us one faith; He created one Church for us, not many different faiths and 'churches.' This is confirmed by the holy Apostle Paul when he says, 'One Lord, one faith, one baptism, one God and Father of all,' and so we Christians should form 'one body and one spirit,' as we are called to 'in one hope of our calling' (Eph. 4:4-6). If there is only one true faith and only one true Church, then as a consequence all other faiths and 'churches' are false, not true. How then can anyone say that all faiths and 'churches' are of equal value and that 'it is all the same which church you go to.' Therefore one can and must speak not of the ecumenical unification of everyone for the creation of some new Church, but only of the restoration of union between all who have fallen away and the one true Church of Christ to which Christ the Savior Himself gave the great and sure promise that 'the gates of hell will not prevail against it' (Matt. 16:18).
If you speak of pagan abuses, these abuses do not make our veneration of images loathsome. Blame the pagans, who made images into gods! Just because the pagans used them in a foul way, that is no reason to object to our pious practice. Sorcerers and magicians use incantations and the Church prays over catechumens; the former conjure up demons while the Church calls upon God to exorcise the demons. Pagans make images of demons which they address as gods, but we make images of God incarnate, and of His servants and friends, and with them we drive away the demonic hosts... If the Scripture says, The idols of the nations are silver and gold, the work of men's hands (Ps. 135:15), it is not forbidden to bow before inanimate things, or the handiwork of men, but only before those images which are the devil's work.