It was only after 70 A.D. that רַבִּי (rabi) became a formal title for a teacher, and thus cannot correctly be applied to Jesus.
The “How Much More” Rabbinic Principle of Interpretation in the Teaching of Jesus
The use of simple-to-complex reasoning (kal vahomer in Hebrew) is as frequent in the teaching of Jesus as in the teaching of the sages.
Hebrew Nuggets, Lesson 9: Hallelujah (Part 1)
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Salted with Fire
Among the difficult sayings of Jesus, Mark 9:49 is one of the most enigmatic. Almost all previous explanations of this verse have dealt with the Greek text, but like many of the difficult sayings of Jesus, this one simply cannot be explained from the Greek alone.