Werner Koch's .signature
The .signature of Werner Koch, maintainer of GPG, says
Omnis enim res, quae dando non deficit, dum habetur et non datur, nondum habetur, quomodo habenda est.-- Augustinus
I think this means "So everything which is not lessened by being given away, is, as long as it is possessed and is not given away, not yet possessed in the way it ought to be possessed".
Indeed, here it is in the license for MIT Photonic Bands. I followed the link to De Doctrina Christiana there and happened on the very interesting claim
But neither does any man hate his own body. For the apostle says truly, "No man ever yet hated his own flesh." And when some people say that they would rather be without a body altogether, they entirely deceive themselves. For it is not their body, but its corruptions and its heaviness, that they hate. And so it is not no body, but an uncorrupted and very light body, that they want.
Here's Koch's own explanation of the quotation he uses.
