The important thing, Jesus is saying (in Matthew 5:33-37), is to tell the truth and keep one's pledges without insisting that a certain form of words must be used if it is to be binding. No oath is necessary for the truthful person... Their word is so reliable that nothing more than a statement is needed from them.

So there are all kinds of things that grammarian purists would argue are awkward forms of speech and sometimes they are intentional for rhetorical effect and sometimes it's the way people chose to write at the time. Inerrancy isn't interested in any of those kinds of things.

Sin defies God, utterly corrupts each individual, corrodes all social relationships, and issues in death.

There is a certain kind of maturity that can be attained only through the discipline of suffering.

God is absolutely sovereign, but his sovereignty never mitigates human responsibility.

There is no long-range effective teaching of the Bible that is not accompanied by long hours of ongoing study of the Bible.

To assume the gospel in one generation is to lose it in the next.