‘The Blessed.' An indirect reference to God.
‘And Jesus said, “I am. And you will see the Son of Man sitting at the right hand of power and coming in the clouds of heaven.”
In Mark His ‘I am' is a direct Messianic claim, and more. Matthew 26:64 and Luke 22:70 make the reply more indirect as do some important authorities here - ‘you say that I am'. But it is the expression that is different. The essence is the same. Jesus did not deny His Messiahship by either answer. Mark simply translates very positively. That he is justified comes out in the following words.
‘You will see the Son of Man sitting at the right hand of power (i.e. of God).' This is a reference to Psalms 110:1. Here was a direct claim to be God's ‘right hand man' as sovereign over the world, based on a Psalm that was seen as Messianic. And He further declares that this would happen to Him as ‘the Son of Man'.
‘The son of man --- coming on the clouds of heaven.' See Daniel 7:13 where it refers to the representative of Israel coming into the presence of God to receive an everlasting throne. There are no grounds for seeing this as referring to the second coming, an idea which would have been foreign to those present. They would rightly have seen it as signifying His approach to God to be enthroned and glorified. (Matthew's ‘from now on ---' (Matthew 26:64) specifically excludes it from referring to the second coming). Here then is a further claim that He is to receive kingship, authority and glory from God
So Jesus' claim was that as Son of Man He was about to share God's authority and be exalted as ruler of the world and as God's representative King. He was to be a heavenly Messiah. And in Matthew and Luke He further claimed that this would become apparent to them - ‘you shall see' - as His Kingly Rule was exercised. This went beyond the idea of the earthly Messiah ruling over the world. It was a claim to divine exaltation.