Regarding this Holy Light which although many say is a great miracle of Orthodoxy, others propose various theories to debunk this miracle, Patriarch Theophilos says the following:
"All the various perspectives and theories regarding the Holy Light come from people who are in complete ignorance, they have no religious sentiment even when they are disputed, and they do not want to receive the mystery of the divine economy, namely the Incarnation, beyond which I think all other things are redundant."
To the question about what exactly happens in the ceremony, he responded:
"The ceremony of the Holy Light is part of all the ceremonies and mysteries of our Church. The ceremony of the Holy Light is the sole and exclusive privilege of the Church of Jerusalem as this ceremony takes place at the specific site of the Crucifixion and Burial, and especially the Resurrection of Christ, in other words in the new tomb."
He further explained that the Touching of the Holy Light "is a Mystery of the Church, it is a ceremony."
To the question about what he feels when he is kneeling in prayer and this Touching of the uncreated light occurs, he responded:
"What occurs then occurs in the whole world, it is the experience which a person receives when they participate in the Mystery of the Divine Eucharist."
For more on the Holy Light 2010, see here.