en_tn_lite_do_not_use/mat/26/64.md

You have said it yourself

"You are saying it" or "You are admitting it"

from now on you will see the Son of Man

Possible meanings are 1) the phrase "from now on" is an idiom that means they will see the Son of Man in his power at some time in the future or 2) the phrase "from now on" means that from the time of Jesus's trial and onward, Jesus is showing himself to be the Messiah who is powerful and victorious.

sitting at the right hand of Power

"sitting in the place of honor beside the all-powerful God"

coming on the clouds of heaven

"riding to earth on the clouds of heaven"