Jeremiah 16

“However, the days are coming,” declares the Lord, “when it will no longer be said, ‘As surely as the Lord lives, who brought the Israelites up out of Egypt,’ but it will be said, ‘As surely as the Lord lives, who brought the Israelites up out of the land of the north and out of all the countries where he had banished them.’For I will restore them to the land I gave their ancestors. vv.14-15

Read chapter 16
The biggest event that the Israelites held on to of what God did for them was when they were given freedom from slavery in Egypt (the Exodus).  Yet the Lord is proclaiming and even greater act of freedom from bondage was going to come.  Yes after exile for 70 years the remnant of Israelites who are still alive get to return back to Jerusalem, but I think God is talking about a different event- the Kingdom.  In Egypt Israel was in bondage in just one land, but now they are scattered all over the world.  In the Kingdom all Israel will be gathered together from all places and all times- truly a great gathering.  Yet not only is this a great gathering but the end of oppression from the enemy, Satan, who will no longer be the prince of this world deceiving everyone into bondage.  
What is an event in your life that God did for you?  How can you not only cling to what He has done but what He will do for your hope in this world we live in today?