Have a read of A New Stoicism by Lawrence C Becker [0]. It is quite technical in places but the introductary chapters and the conclusion will do enough to put old Bertie back in his logical positivist box. It's not as if Bertie was a slap, happy old hippy himself.

[0] - http://www.amazon.com/New-Stoicism-Lawrence-C-Becker/dp/0691...