The "Good Olive Tree" is often mistaken as being the Nation of Israel. However in this passage we see in context this Tree is not Israel but rather Christ, The Tree of Life, to which we are grafted into or cut off of on the bases of Faith. In this we show, from Apostle Paul's typology and supporting passages of scripture, the true meaning and nature of God's Olive Tree and how it is in truth a reference to being connected to the Spirit of Christ for strength in performing His ministry and work.
In this message we show how it is important to receive strength for ministry (both of National or Church Covenant, or individual ministry) by remaining connected to the Body of Christ. In this passage we see that the ability of Israel to continued ministering for God (As the Good Olive Tree's caretakers) stopped when they as a nation were broken off from their source of strength and we as gentile believers were graphed in and now make up much of the Church ministers in the Body of Christ.