Wherein does the new covenant differ from and excel the old?

Answer

"But now hath He obtained a more excellent ministry, by how much also He is the mediator of a better
covenant, which was established upon better promises." Heb. 8: 6.

In what way is this comparison further explained?
By whom were the heaven and the earth created?
Who was this promised seed?
What did this power do to the truth?
When are the saints to he like Jesus?
What promise is made to those who look for Him?
How does Joel describe the day of the Lord?

Questions & Answers are from the book Bible Readings for the Home Circle