Romans 11:20-22

20Well; because of unbelief they were broken off, and thou standest by faith. Be not highminded, but fear:

21For if God spared not the natural branches, take heed lest he also spare not thee.

22Behold therefore the goodness and severity of God: on them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off.