Meaning
1. The MISHNA, or "second law," which contains a compendium of the whole ritual law, was reduced to writing in its present form by Rabbi Jehuda the Holy, a Jew of great wealth and influence, who flourished in the second century of the Christian era. Viewed as a whole, the precepts in the Mishna treated men like children, formalizing and defining the minutest particulars of ritual observances. The expressions of "bondage," or "weak and beggarly elements," and of "burdens too heavy for men to bear," faithfully represent the impression produced by their multiplicity. The Mishna is very concisely written, and requires notes.
2. This circumstance led to the commentaries called GEMARA (i.e. supplement, completion), which form the second part of the Talmud, and which are very commonly meant when the word "Talmud" is used by itself. There are two Gemaras; one of Jerusalem, in which there is said to be no passage which can be proved to be later than the first half of the fourth century; and the other of Babylon, completed about 500 A.D. The latter is the more important and by far the longer.