I have listened very carefully, to Fr Zacharias of Essex speaking on Purgation, Illumination and Deification on YouTube.
He says that, during the first stage we have the presence of God with us, but in the second stage, it is removed and we are in the 'desert' situation. We are to continue as though we still have His presence and not become discouraged and then ----slowly, slowly, we will reap the rewards of it and become like Christ. He repeats slowly, slowly, a number of times to emphasis it.
This is just about the same as all denominations teach and which is called Gradual Sanctification (apart from what remains of the original Methodism). There is no difference in the details - different types of communion, Bible study, sermons, Divine Liturgy. As God sees the heart, the outward actions are not salvivic.
It is not what Orthodoxy called the Faith handed down, it was not the original understanding which was carried over to Protestantism by such as John Wesley. Illumination comes after a crisis. Our flesh is not able to be improved upon, it is sin and is to be destroyed and not slowly. Crucified.
I dare say you will disagree, as this new interpretation is so widespread. However I would ask you to consider why Orthodoxy is in such a state. They have moved away from the truth and satan has come in.
Once the true church has been sunk, there is nothing left. I will not quote the early fathers to show the difference. I am too ill to do much research atm.
Very sad day for me who thought that there was still a chance.