Rabbenu, " our Rabbi teaches us "; on the critical questions connected with the titles and the present redaction (probably 5th century), see Jew.
The first book teaches physics - in the wide sense which the Greeks assigned to this term - by means of extracts.
Further, he urges that all historical study is valueless which does not take in a knowledge of original authorities, and he teaches both by example and precept what authorities should be thus described, and how they are to be weighed and used.
The reality of this tendency, particularly at Rome, betrays itself in Hermas, who teaches the supererogatory merit of alms gained by the selfdenial of fasting (Sim.
I (preaches in the synagogues, later more commonly by the lake-shore or on the mountain sides; or He teaches in a house where He happens to be); at iv.