shabbat 75

the importance of studying and teaching the wisdom and science of the stars in the heavens above.

and knowing how to expertly remove blood from what is found in the seas and sand below.

- just be careful who you study with.

(amongst the list of main categories of prohibited work on shabbat is a criticism of not speaking if one knows about the stars. an interesting perspective on the importance of scientific knowledge. wisdom and understanding that is recognised by all. but also is a warning not to learn anything from a magosh, persian priest. for english translation of this talmud page, see here)