[Avodah] timtum halev

[David Riceman]

Micha Berger wrote:
> On Wed, Mar 10, 2010 at 12:42:33AM +0200, Tal Moshe Zwecker wrote:
> : As far as I understand it timtum halev means that one's insight and
> : intellect found in the heart are stuffed up and blocked up
>
> So, if I understand you correctly...
>
> 1- Timtum haleiv can occur even if someone followed hilkhos birur, but
>    happened to eat food that was lemaaseh treif.
> 2- Timrum haleiv refers to processes that impact one's bechirah.
>
> Don't you see my problem with this?
>   
To follow RRW's paradigm, what early sources mention timtum halev? When 
is it first used in a halachic context?

David Riceman