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. 
Mediator as applied to Christ, is borrowed from persons, whose office it is to reconcile such parties as are at variance, being as it were in the middle, betwixt both, soliciting the cause of each to the other, till they bring them to concord or agreement.
Was the kingdom offered to Israel? Ultimately, one’s answer to this question hinges upon how strictly he defines the word offer.
When is the list time you got rested up?  Does God allow Christians to take a break from work and service?
When others speak wrongfully of you, what do you do?  Do you take that time to ask God if what is being said is true?  Do you turn to God and ask Him to search your heart for any wrong doing?  You may be surprised what God would do in your heart during the times when you have been done wrong.
