What does the story of Abraham's willingness to sacrifice his son Isaiah teach us?

Here Abraham was willing to sacrifice his only son Isaac , and not Isaiah.

The offering of Isaac was a foreshadowing of the death of Jesus. A Father offering His only Son. This took place on Mount Moriah, the very same place where 2000 years later God's own Son was offered. Thus it was a foreshadowing, here at the birth of the Hebrew nation, of the grand event the nation was born to bring about.