The Eastern Orthodox church would appear to disagree with you. Knowing other people's dogmas and ideas (honestly knowing them for the sake of dialogue and for the sake of the salvation of us all; not judging them) is just as relevant today as it was when the Church was young.
From Fr Thomas Hopko, http://www.oca.org/occhapter.asp?sid=2&id=1
At this point it must be mentioned that although God's self-revelation in history through the chosen people of Israel--the revelation which culminates in the coming of Christ the Messiah--is of primary importance, it is also the doctrine of the Christian Church that all genuine strivings of men after the truth are fulfilled in Christ. Every genuine insight into the meaning of life finds its perfection in the Christian Gospel. Thus, the holy fathers of the Church taught that the yearnings of pagan religions and the wisdom of many philosophers are also capable of serving to prepare men for the doctrines of Jesus and are indeed valid and genuine ways to the one Truth of God.
In this way Christians considered certain Greek philosophers to have been enlightened by God to serve the cause of Truth and to lead men to fullness of life in God since the Word and Wisdom of God is revealed to all men and is found in all men who in the purity of their minds and hearts have been inspired by the Divine Light which enlightens every man who comes into this world. This Divine Light is the word of God, Jesus of Nazareth in human flesh, the perfection and fullness of God's self-revelation to the world.
What you say here is very nice to hear. It makes room for everybody and everything.
Like the canons of Eutopia.
Maybe that is what we all need.
But first we must consder as orthodox after reading this wonderful thought is 'how can we find this same thought in the word of God in Christ Jesus?
Is this what is found in our Orthodox Cannon Law and belief?
And even iof we find certain things consistent; "truthful" maybe key things.......Are we to go around preaching Aristotle or John Wesley or Roger Williams or David Karesh or anyone else because they by some consciouness have by 'incident' or inclination share a like-minded-ness to the true teachings of the Holy Church?
Maybe on some issues only maybe?
Maybe just really small issues of a social sort?
Our Church fathers (all of us) are obligated to uphold the teaching and Holy traditions of the Holy Church.
We do not condem others who have some symblance of congruency with us albeit not with us. More so...WE 'reject' all; not the persons; but all teachings regardless of the 'likeness' or 'closeness' with us since such teaching are not FROM within the Holy Church.
The Holy Church is the ONLY authority for truth to the true Christian who is Orthodox in the faith.
Those who posess similar truths that may agree with ours must be judged by God in due time not by you or me. WE can say that they will not be saved if they have not professed Jesus Christ alone and Him by no other name or in any other person.
But WE are to ignor completely niether accepting nor denying what they teach or know as truth.
WE may even say that there is truth in the heart of all men. Why would'nt it be?
This should be obvious.
Adam had the truth in him. But yet perished!
WE must keep in mind that truth is not 'fruitful' without it being firnly and properly planted in the "good soil". That "Good soil" is the Holy Church Of Christ.
Also let us keep in mind that there are many in the world who have truth and will never see God or know His Salvation. Sadly; many of us who are bearers of the truth 'in-Christ' which is the fullness of all truth also will not see Gods Salvation. This fact should strike fear in the hearts of anyone of us who are depending on Gods Salavation.
The beginning of the 'truth' is Love which is in Christ.
The end of the 'truth' is Salvation and eternity with Christ.
WE as orthodox in the faith are preparing for eternity with God in Christ.
This is the beginning and the end of the only truth that matters to the orthodox