Commentaries:
Robertson's Word Pictures (NT)
If so be that God is one (eiper eiv o qeov). Correct text rather than epeiper. It means "if on the whole." "By a species of rhetorical politeness it is used of that about which there is no doubt" (Thayer. Cf. I Corinthians 8:5; I Corinthians 15:15; Romans 8:9.
By faith (ek pistewv). "Out of faith," springing out of.
Through faith (dia thv pistewv). "By means of the faith" (just mentioned). Ek denotes source, dia intermediate agency or attendant circumstance.
Other Robertson's Word Pictures (NT) entries containing Romans 3:30:
Romans 3:21
Romans 8:9
Romans 8:33
1 Timothy 2:5
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