True enough, maro. But Socrates was never able to "teach" the Sophists...presumably because they did not share his "universe of discourse." The great divide between the two "camps" was that the Sophists insisted that "man is the measure of all things" (and thus generally went about telling people exactly what they wanted to hear in "high-blown language," for pay); whereas Socrates believed that the worthy man attunes himself to the divine measure. In many ways, the present dispute, so characteristic of our culture today, is a recapitulation of this most ancient one...and may well come to the same result.
For when the Sophist opponent realized Socrates had "beaten" him in debate, typically he had this nasty habit of going all surly, nasty on him.... That such men had long memories of grievance at the hands of Socrates accounts for the fact that Socrates was tried, convicted, and executed -- preeminently on the testimony of defeated adversaries (e.g., Anytus, Meletus) in debate....
I'll see what I can do about coming up with an "outline," since you express interest (might take me a while, though). Whether it will pass for philosophy, I'll leave it to you to judge.
One thing's for sure, Voegelin is not a "school philosopher," such as, for instance, the German Idealists: Unlike, say, Hegel, or even Kant, he wasn't a "system builder." I really don't know how to classify him -- he's been called a "philosopher of history," and an "historian of philosophy," among other things. I just think of him as a "philosopher of consciousness" or of "open existence" -- which IMHO would place him in the company of Plato, Aristotle, Nietzsche, and Kierkegaard (the latter two each in his own way), for examples.
Thank you for writing, maro.