Why John Calvin is Such a Remarkably Contemporary Bible Commentator

I'm reading in his commentary on Jeremiah and came across this comment at Jeremiah 17.9,10,

What is taught here depends on what is gone before; and therefore they ought to be read together. Many lay hold on these words and mutilate them without understanding the design of the Prophet. This is very absurd: for we ought first to see what the prophets had in view, and by what necessity or cause they were led to speak, what was their condition, and then the general doctrine that may be gafilered from their words. If we wist to read the prophets with benefit, we must first consider the reason why a thing is spoken, and then elicit a general doctrine.

You couldn't write a clearer philosophy of biblical exegesis then this. Read the passage in it's context. Figure out what the writer meant. Then figure out why he wrote it, and finally come up with the big idea. Perfect induction. I believe "gafilered" must have meant "gathered," because I can't find the word anywhere.