The Old Testament reading is the account of God's require- ment of Abraham to do sacrifice, in which Abraham is directed to take his son, Isaac into the mount. Read Genesis, chapter 23.
The Psalm is the 116th.
The Epistle is Romans 8:31 - 34:
Brothers and sisters: If God is for us, who can be against us? He who did not spare his own Son but handed him over for us all, how will he not also give us everything else along with him?
Who will bring a charge against God's chosen ones? It is God who acquits us, who will condemn?Christ Jesus it is who died—or, rather, was raised— who also is at the right hand of God, who indeed intercedes for us.
And the Gospel is Mark 9:2 - 10.
Think of that. Jesus Christ is the propitiation, the sacrifice, for our sins; and He intercedes for us!