Ksav Tamim is a fascinating work by the thirteenth century Tosafist R. Moshe ben Chisdai Taku (alt.: Tachau). It is a lengthy polemic against the anti-anthropomorphic position taken by figures such as R. Saadiah Gaon. R. Moshe Taku insists that God can and does take on physical form, and considers those who believe otherwise to be denying the truths of Tenach and Chazal. I was recently hired by ArtScroll to produce an annotated translation of Kesav Tamim.
Just joking! It wasn't ArtScroll that hired me, it's someone else. No, I can't say who. Anyway, because of this project, even though I had previously looked through virtually all of Ksav Tamim, I am now going through it much more carefully. It is absolutely fascinating. Some people may wonder what the value of this work is today. One answer is that, if we are to understand all the diverse Torah scholars of the past, it is invaluable to gain an appreciation of just how different some of them were from our own worldview; this helps overcome the natural tendency to read our own outlook into others. In addition, when you have one of the Baalei Tosafos, praised by Ramban as a great Torah scholar, staunchly advocating an approach that many would rate as heresy, this forces us to re-assess how we define heresy and heretics. This is something that I address at length in the latest issue of Hakirah, in my article, "They Could Say It, We Cannot: Defining the Charge of Heresy."
My translation will not be published for a long time yet, but in the meanwhile, the Hebrew edition of Ksav Tamim can be downloaded here. This is the version from SeforimOnline, which includes some of the text appended from Arguat HaBosem and ends with a page from Ramban which includes praise of R. Moshe Taku. There is also an interesting article by Rabbi David Sedley about R. Moshe Taku, corporealism and rationalism, which you can download here.
P.S. Please remember the new "I need to spend less time on this blog" comments policy. If your comment requires a response from me, it's less likely to be posted. If you have a question, your best bet is to email me.