“Well; because of unbelief they were broken off, and thou standest by faith. Be not highminded, but fear:”
King James Version (KJV)
11:20 They were broken off for unbelief, and thou standest by faith - Both conditionally, not absolutely: if absolutely, there might have been room to boast. By faith - The free gift of God, which therefore ought to humble thee.
Ro 11:20 Because of unbelief they were broken off. Had they believed, they would have remained. The Gentile is grafted in when he believes. Thou standest by faith. Unbelief would cut off the Gentile branch as well as the Jew.