In Context

20 by unbelief they were broken off, and thou hast stood by faith; be not high-minded, but be fearing;

21 for if God the natural branches did not spare — lest perhaps He also shall not spare thee.

22 Lo, then, goodness and severity of God — upon those indeed who fell, severity; and upon thee, goodness, if thou mayest remain in the goodness, otherwise, thou also shalt be cut off.

23 And those also, if they may not remain in unbelief, shall be graffed in, for God is able again to graff them in;

24 for if thou, out of the olive tree, wild by nature, wast cut out, and, contrary to nature, wast graffed into a good olive tree, how much rather shall they, who are according to nature, be graffed into their own olive tree?

25 For I do not wish you to be ignorant, brethren, of this secret — that ye may not be wise in your own conceits — that hardness in part to Israel hath happened till the fulness of the nations may come in;

Romans 11:23 in Other Translations