Well, call me a geek but Vultus est index animi has long been one of my favourite expressions.

And now I know it in Spanish as well:

Los ojos son el espejo del alma.

Now all I need to do is Cautus metuit fovea lupus in Spanish and I’ll be happy.

All you need are a few handy expressions in other languages to sound intellectual, witty and ever so.

Or alternatively like you are a total numpty desperately trying to impress.

Besos.

MF.