The difficulty presented by the obscurity of the style is increased by allusions to facts and customs which are no longer known and cannot always be guessed at. Now, thanks to Rashi's commentary, a reader possessing a knowledge of the elements of the language and some slight knowledge of Jewish law, can decipher it without overmuch difficulty.
Rarely superficial, Rashi explains the text simply yet thoroughly. He sifts his matter to the bottom. His reasoning is free from subtleties and violations of the sense. This characteristic comes out in bold relief when we compare Rashi with his disciples, the Tossafists, who carry their niceties to an excess. It would be wrong to hold Rashi responsible for the abuse later made of controversy; while, on the other hand, praise is owing to him for the happy efforts he made to unravel the texts, not only for the purpose of explaining their meaning, but also to indicate possible objections and reply to them in a few words. One must marvel at the clearsighted intelligence, the sureness, the mastery with which Rashi conveys the gist of a discussion as well as the value of the details, easily taking up each link in the chain of question and answer, pruning away superfluities, but not recoiling before necessary supplementary developments. In addition, rather than resort to forced explanations, he did not hesitate to avow that certain passages puzzled him, or that his knowledge was insufficient - a scruple not always entertained by his successors.
To determine the meaning of a text, Rashi frequently referred to parallel passages, contained not only in the Gemara itself, but also in other collections, such as the Tosefta, or the Halakic Midrashim.[99] Sometimes the Gemara cites them, or refers to them, at other times it makes no allusion whatsoever to them. In the latter case, it may be stated, Rashi, even when he does not say so explicitly, himself found the text for comparison and was inspired by it.
Moreover, on occasion, he points out general rules to which he conforms, some of them indicated in the Talmud itself, others provided by the Geonim, and others again evolved by himself in the course of his studies. Those who are competent to judge admire the precision with which he lays down these principles. By combining them, an excellent, although very incomplete, Talmudic methodology might be drawn up.
Some examples will give a better idea than a mere description of Rashi's method. I will separate his commentary from the text of the Gemara by square brackets, so as to show how he inserts his commentary, and how perfectly he adapts it to the Gemara.
The following passages deal with the proclamation of the new moon, made by the supreme tribunal, upon the evidence of two persons who declare that they have seen the new moon.
Mishnah: If he is not known [if the tribunal does not know the witness, does not know if he is honest and worthy of confidence], they [the tribunal of his city] will send another person with him [to bear witness concerning the new moon before the great tribunal, which proclaims the new month]. At first, evidence concerning the new moon was accepted from any and every body; since the Boethusians[100] turned to evil [this is explained in the Gemara], it was decided that only the testimony of persons who were known would be taken.
Gemara: What does "another" signify? Another individual? Does it mean that a single person is thought [worthy of confidence in declaring the first night of the new moon]? Is it not taught in a Baraita: "It once happened that a man came [to the tribunal, on the Sabbath, in order to give evidence concerning the new moon], accompanied by <I>his witnesses,</I> to testify concerning himself" [to declare him worthy of confidence]? Rab Papa replies: "Another" signifies "another couple of witnesses." This explanation seems to be the true one; for otherwise what would these words signify: "If he is not known?" If this individual is not known? But does it mean that a single person is believed [in bearing witness in regard to the new moon]? In connection with this, do not the Scriptures use the word law [in the verse: For this was a statute for Israel, and a law of the God of Jacob[101]? Here, then, "the witness" signifies "the couple" of witnesses; similarly the previous "another" signifies "another couple." But is it quite certain that a single man is not enough? However, it is taught in a Baraita: "It once happened on a Sabbath that R. Nehoral accompanied a witness to give evidence concerning him at Usha" [at the time when the Sanhedrin had its seat in that city, and the new moon was proclaimed there]. R. Nehorai was accompanied by another witness, and if this witness is not mentioned, it is out of regard for R. Nehorai [for R. Nehorai is mentioned only that we may infer from his case that so prominent an authority inclined to leniency in the circumstances stated; but it is not fitting for us to appeal to the authority of his less important companion]. Rab Ashi replies: There was already another witness at Usha [who knew the one that was coming to give evidence], and R. Nehorai went to join him. If this is so, what is it that is meant to be conveyed to us? This: we might have thought in case of doubt [possibly this second witness might not be at home], the Sabbath must not be trangressed; we are thus taught that one should do it, etc. (<I>Rosh ha-Shanah</I> 22a bottom).
The following passage deals with the <I>Lulab,</I> which is used at the celebration of the Feast of Tabernacles, and must be flawless.
<I>Mishnah:</I> A Lulab [referring to the palm branch; farther on it will be stated that the myrtle and the willow of the brook are dealt with separately] that has been stolen [is unfit; for it is said:[102] "And ye shall take you": what belongs to you], or is dry [we demand that the ritual be carried out with care, in conformity with the words of Scripture:[103] "I will exalt Him ">[, is unfit. Coming from an Ashera [, or if its leaves have fallen off [from the central stem, and are united only by a band like the broom, in French called "escoube."[106] In this case, also, it is not "beautiful">[, it is unfit. If its leaves are separated [attached to the stem, but at the top separated on each side, like the branches of a tree], it is good. R. Judah says: It should be bound [if its leaves are separated, they should be bound so that they are fixed to the stem as with other Lulabim]. The stony palm of the mountain - of - iron [the Gemara explains that these are palms] are good [they are Lulabim, although their leaves are very small and do not extend the length of the stem]. A Lulab having the length of three palms, so that it can be shaken [the Gemara explains: the stem should measure three palms, as much as the myrtle branch, and, in addition, another palm for shaking, for we require that the Lulab be shaken in the way told farther on (37b): "It is shaken vertically and horizontally," so as to exorcise the evil spirits and evil shades), is good.