The point of that Icon is to show the Original way the the sign of the cross was made.
It is, in fact, the sign of the cross. Anyone with eyes could see that.
He's not making the I C X C sign, that sign had not been created until later.
This is a 6th century AD Icon from Sinai.
It shows us how the Christians originally made the sign of the cross. And they blessed people in that way also.
Jesus is blessing us in that Icon. The two fingers represent the human and the Divine natures of Jesus Christ.
To me, the Old way of making the cross makes more sense. Because it very obviously reveals the Divinity and humanity of Jesus Christ.
Which the anti-christ will try to pervert at the end of times.
People have started to question the Divinity of Jesus. They say, ''No, Christ was only a great Philosopher, he was not God.''Revelation 3:10Because thou hast kept the word of my patience, I also will keep thee from the hour of temptation, which shall come upon all the world, to try them that dwell upon the earth.
That is how the Fathers interpret that verse.
The temptation that will 'come upon all the world
', is the question of Christ's Divinity.
Its very interesting to listen to these homilies on Revelation by this very wise man:
The words that come from this man's mouth are golden.http://www.philokalia.org/apocalypse.htm