Well, I guess I would say that if I ever found myself on the wrong side of St Maximos, I would assume the error was mine. St Maximos is not Marcion, or a heretic, and this writing comes from the Philokalia, probably the most influential and widely used book in orthodoxy obviously other than Holy Scripture, particularly among monastics. What I mean to say, is this was preserved for it's great beauty and usefulness.
St Maximos is not teaching that the physical is bad. Quite the contrary, much of what St Maximos' cosmology includes the redemption of the entire universe, including the physical. He also doesn't teach a divide between physical in spiritual, but that the "physical way" is not the "divine way" (my summary). The anti-physical "common" in western Christianity is not actually all that common in the east, largely in part to our teaching from people like St Maximos.
There is no divide between Greek and Hebrew in Christianity; philosophy is not what our faith practices. We practice Theology, which is from God. Since you quoted St Clement's Stromata, in it he says "The Hellenic philosophy is like the torch of wick which men kindle, artificially stealing the light from the sun. But on the proclamation of the Word all that holy light shone forth." and "Men must then be saved by learning the truth through Christ, even if they attain philosophy." In Christianity there is one Truth, which is only Christ: we "have only one Teacher".
St Maximos is not stating that physical observance of the Law is evil. He is saying that merely observing the letter, merely observing the physical, is idolatrous. The Law is an icon of Christ. Second temple Judaism mistakenly elevates the Torah to the expression of the Divine Will, the Wisdom of God. This is incorrect; Christ is the Divine Wisdom, the Logos of the Father. St Paul said Christ was "the power of God and the wisdom of God." To this end, Christ is the LAW of the universe, the divine logos by which the universe was made (as we say in the symbol of faith "by whom all things were made"), while the Torah is merely the Law, an Icon of The LAW, something that points us to its prototype.
St Maximos is expanding here on 2 Corinthians 3. But as St Paul states (and St Maximos quotes) in 2 Cor 3:6 "[God] made us adequate as servants of a new covenant, not of the letter but of the Spirit; for the letter kills, but the Spirit gives life." In that same chapter St Paul calls the Law "the ministry of death" and "the ministry of condemnation". St Paul says "For indeed what had glory [i.e., the Law], in this case has no glory because of the glory that surpasses it [i.e., Christ, the LAW]. For if that which fades away was with glory, much more that which remains is in glory." These are bold words, which St Paul recognizes - he says "we use great boldness in our speech".
In that light, re-read what St Maximos says. If we cling to what kills, we will not find life. If we cling to the Law, which is about Christ, and are satisfied with something in place of Christ, we have nothing. Such a person would then worship the icon instead of the real thing. As Christ said "a time is coming when you will worship the Father neither on this mountain nor in Jerusalem...a time is coming and has now come when the true worshipers will worship the Father in spirit and in truth, for the Father is seeking such as these to worship Him. God is Spirit, and His worshipers must worship Him in spirit and in truth." And then St Maximos goes on to show how the sabbath, Passover, Pentecost, etc. are icons of true salvation, which is Christ.
Which, of course, is perfectly harmonious with the next passage of 2 Corinthians 3. St Paul says that the understanding and ability to view the glory of Christ is like a veil over the old covenant, and can only be lifted in Christ. In Christ we behold His glory, and in Christ we are transformed to be like Him.
The Law cannot deify us. If followed, it can save us - but who can follow it? No one, "not even one".
Faith in Christ can save us. In this regard, it is the same as the Law. The difference is that it is effective, it works. And so, with Christ, the purpose of the Law is fulfilled. Salvation is by Christ, He is the end, the culmination, the completion, the telos of the Law. (Romans 10:4).
The amazing part is that the new covenant covers the old and surpasses it so much further. Once justified, once saved, we proceed onward in Christ. Not by the Law, but in the LAW. We aren't subject to the "tutor" (the pedagogue, Galatians 3:24) that the Law was, because we aren't slaves. We are elevated by the "Lawgiver and Judge" to become co-heirs with the Son (Romans 8:17).
The lack of this beautiful gospel is why the ebionites were considered "poor" in their understanding. This is why St Maximos says if we apprehend the Law in a literal way -- meaning in an absence of understanding the spiritual way -- there is death. Which is exactly what St Paul taught.
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If it makes you feel any better, St Maximos likes to use the Joseph and Potiphar's wife metaphor to help teach the difference between God and things around God. In his Ambigua he uses the exact same imagery about Holy Scripture (!) saying that if we stop at the scriptures we'll lose out on Christ Himself. So don't presume he's saying that it's evil, because obviously he doesn't think the Scriptures are evil and he spoke of them in the same way.