Commentaries:
Robertson's Word Pictures (NT)
If they continue not in their unbelief (ean mh epimenwsi th apistiai). Third class condition with the same verb used in verse Romans 11:22 of the Gentile. Locative case of apistiai here (same form as the instrumental in verse Romans 11:20).
For God is able (dunatov gar estin o qeov). See this use of dunatov estin in Romans 4:21 rather than dunatai. This is the cruc of the whole matter. God is able.
Other Robertson's Word Pictures (NT) entries containing Romans 11:23:
Romans 11:28
Titus 1:9
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