The teaching set forth in Matthew chapters 24 and 25 is commonly identified as the Olivet Discourse and contains a detailed explanation of the end-times.
Do your sins leave you good for nothing in the sight of God? Would you be willing to seek His face so that you might be a vessel of honour in His hands?
If God would break His promises to Israel, He might break other promises. But He never does. What other promises can we rest assured that He will keep?
