Even an inanimate object can move a source of impurity in that way. And if the food and drink tipped the scales, they remain ritually pure. The Gemara asks: In accordance with whose opinion is that which was taught in a baraita: All impure items that move other objects remain pure, meaning that an object does not become impure if moved by a source of impurity, except for movement by a zav, which has no counterpart in the whole Torah in its entirety? Let us say that this is not in accordance with the opinion of Rabbi Akiva, as if it were in accordance with the opinion of Rabbi Akiva, there is also the case of idolatry. In his opinion, idolatry also transmits impurity to an object by moving it. The Gemara answers: Even if you say that the baraita is in accordance with the opinion of Rabbi Akiva, teach: Zav and everything similar to it. According to Rabbi Akiva, just as a menstruating woman falls into that category, so too does an idol.

The dilemma that was cited incidental to an earlier discussion is examined here in depth. Rav Ḥama bar Guria raised a dilemma: Does idolatry have the capacity to transmit impurity through limbs or does it not have the capacity to transmit impurity through limbs? The Gemara narrows the parameters of the dilemma. In a situation where a common unskilled person can restore it to its original form, do not raise the dilemma, as in that case it is certainly considered to be attached and is not considered broken. The case where you could raise the dilemma is where a common unskilled person cannot restore it to its original form. What is the ruling in that case? The two sides of the dilemma are: Do we say that since a common unskilled person cannot restore it, it is considered broken? Or perhaps we say that it is not lacking anything? Idolatry can only be nullified by breaking it in a case where, as a result, it is incomplete. And some raise this dilemma in another direction based on a different assumption: In a situation where a common unskilled person cannot restore it to its original form, do not raise the dilemma, as in that case it is certainly considered to be broken. When you could raise the dilemma is in a situation where a common unskilled person can restore it to its original form. What is the ruling in that case? The two sides of the dilemma are: Do we say that since a common unskilled person can restore it, it is considered attached? Or perhaps we say that at present, it is in pieces and permitted? No resolution was found for either version of this dilemma. Therefore, let it stand unresolved.

Rav Aḥadvoi bar Ami raised a dilemma: What is the halakha with regard to idolatry that is less than an olive-bulk? Rav Yosef strongly objected to this: With regard to what use was this dilemma raised? If you say it was raised with regard to the matter of the prohibition of idolatry, let it only be like Zevuv, the Baal of Ekron, which was the size and form of a fly, as it was taught in a baraita with regard to the verse: ''And they made Baal Berit into their god'' (Judges 8:33). The Sages said that this is referring to Zevuv, the Baal of Ekron. It teaches that each and every person made an image of his god and placed it in his pocket. When he remembered it, he removed it from his pocket and embraced and kissed it. Apparently, even idolatry the size of a fly falls under the rubric of the prohibition of idolatry. Rather, the dilemma is: What is the halakha with regard to the matter of impurity? The two sides of the dilemma are as follows: Since an idol is juxtaposed to a creeping animal, just as a creeping animal transmits impurity when it is a lentil-bulk, so too, idolatry transmits impurity when it is a lentil-bulk. Or perhaps idolatry is juxtaposed to a corpse, and just as a corpse transmits impurity only when it is at least an olive-bulk, so too, idolatry transmits impurity only when it is at least an olive-bulk.

Rav Avya said, and some say it was Rabba bar Ulla who said: Come and hear a resolution to this dilemma from that which was taught in a baraita: Idolatry that is less than an olive-bulk has no impurity at all, as it is stated: ''And he brought out the ashera from the house of the Lord, outside Jerusalem, to the brook of Kidron, and burned it at the brook of Kidron, and stamped it into powder, and cast its powder upon the graves of the common people'' (II Kings 23:6). Just as a corpse transmits impurity when it is an olive-bulk, so too, idolatry transmits impurity when it is an olive-bulk.

The Gemara now asks a general question: And according to the Rabbis, with regard to what halakha was idolatry juxtaposed to a creeping animal? The juxtaposition establishes that like a creeping animal, it does not transmit impurity through carrying. The juxtaposition to a menstruating woman establishes that like a menstruating woman, it has the capacity to transmit impurity through limbs. The juxtaposition to a corpse establishes that it does not transmit impurity when it is a lentil-bulk. The Gemara suggests: Let us say that all of these juxtapositions come to teach a stringency. With regard to what halakha did the Torah juxtapose idolatry to a creeping animal? It is to establish that it transmits impurity when it is a lentil-bulk. The juxtaposition of idolatry to a menstruating woman is to establish that it transmits impurity via a very heavy stone; and the Torah juxtaposed it to a corpse to establish that it transmits impurity imparted by a tent, all of which are stringencies that exist with regard to those types of impurity. The Gemara answers: The impurity of idolatry is by rabbinic law. And whenever there are two possibilities with regard to a rabbinic decree, a leniency and a stringency, we juxtapose to establish the lenient possibility, and we do not juxtapose to establish the stringent possibility.

MISHNA: This is another mishna that digresses from the central topic of this tractate. It, too, is based on an allusion from the Bible. From where is it derived that the ship is ritually pure, in the sense that it cannot become impure? As it is stated: ''The way of a ship in the midst of the sea'' (Proverbs 30:19).

GEMARA: The allusion in the mishna requires clarification. The verse appears to state the obvious. Of course a ship is in the midst of the sea. Rather, this verse teaches us an allusion that the legal status of a boat is like that of the sea. Just as the sea is ritually pure and cannot become impure, so too, a boat is ritually pure and cannot become impure. It was taught in a baraita that Ḥananya says: This halakha is derived from the halakha of a sack, as the impurity of wooden vessels is likened to the impurity of a sack. Just as a sack, which can become ritually impure, is carried both full and empty, so too, any object that is carried both full and empty can become ritually impure. This is to exclude a ship, which is not carried on land full and empty, as due to its weight it cannot be carried full.

The Gemara asks: What is the practical difference between the two reasons? The halakhic ruling according to both is that a ship cannot become impure. The Gemara explains: There is a difference between them with regard to a ship made from earthenware or from any material other than wood. According to the one who said that it is derived from the verse: ''A ship in the midst of the sea,'' this boat is also in the midst of the sea. However, according to the one who said that it is derived from the halakha of a sack, this halakha applies only to those materials that are written in the same verse together with sack and are likened to it. If it is carried both full and empty, yes, it can become impure; and if it can not be carried both full and empty, no, it cannot become impure. However, an earthenware ship can become impure even though it is not carried both full and empty.

Alternatively, there is a difference between them regarding a Jordan ship, which is a small boat used on the Jordan River. According to the one who said that it is derived from the verse: ''A ship in the midst of the sea,'' this is also a ship in the midst of the sea. A river is pure like the sea and the boat will remain pure. According to the one who said that it is derived from the halakha of a sack, and in order to become impure it must be carried full and empty, this is also carried both full and empty, and can become ritually impure. As Rabbi Ḥanina ben Akavya said: For what reason did they say that a Jordan ship can become impure? Because they load it on dry land and carry it on land and then lower it into the water. It is carried on land when full. Rav Yehuda said that Rav said: One should never prevent himself from attending the study hall for even one moment, as this mishna which states that a Jordan ship can become ritually impure was taught for several years in the study hall, but its reason was not revealed until Rabbi Ḥanina ben Akavya came and explained it.

Following Rav’s statement, the Gemara cites that which Rabbi Yonatan said: One should never prevent himself from attending the study hall or from engaging in matters of Torah, even at the moment of death, as it is stated: ''This is the Torah: A person who dies in a tent'' (Numbers 19:14). That is an allusion to the fact that even at the moment of death, one should engage in the study of Torah. Reish Lakish said: Matters of Torah only endure in a person who kills himself over the Torah, one who is ready to devote all his efforts to it, as it is stated: ''This is the Torah: A person who dies in a tent,'' meaning that the Torah is only attained by one who kills himself in its tent. Rava said: