Here's a nice quote on Holy Tradition:
"For the Orthodox Church, Tradition does not consist only of the Scriptures and of the unwritten teaching of Apostles in the form of external formulae, but also of the content of these things, made their own by the faithful of the Church and received in an uninterrupted way, above all received in the holy sacraments, by the aid of divine grace. Tradition in the Orthodox Church is not a sum of propositions learnt by heart, but a lived experience of one and the same relationship with Christ, experienced by the Church in the time of the Apostles, a continuous experience of the whole mystery revealed in Christ. In this way Tradition is a living reality, it is the uninterrupted life of the Church, and as such it can neither be reduced nor increased, not changed in its essence."
Fr Dumitru Staniloae, "The Orthodox Conception of Tradition,"Sobornost 5 [1969]: 653-654.