I'll like to share this piece of publication by a Pastor in Nigeria. I agree with his views too. Romans 11:25 For i would not, brethren, that ye should be ignorant of this mistery, kept ye should become wise in your own conceits; that blindness in part is happene to Israel untill the fullness of the Gentiles be come in. There are two Greek words in that verse that lend critical support to a proper understanding. The first is translated 'full number'. It is a nautical term that describes the pre-determined number of sailors necessary to operate a ship. Until the ship had its full number of crew members, it could not sail. This is why captains sometimes got unsuspecting men drunk and kidnapped them late at night and then set sail immediately. And the second, translated 'come in' is also a nautical term that describe the ships arrival at its destination. By using this terms A. Paul was saying that the blindness will not be fully removed untill the church reaches its pre-determined number and has been taken to heaven. There is nothing arbitrary about God's action here. He has already determined the number and will take the church to its intended destination as soon as that number is reached. Act as far as i can tell no one on Earth knows either the full number or the current number. All we can know is that we'll be raptured when the full number of Gentiles has come in . Thus the message must be reached to the whole world and then the end will come.