וּבַ֣יִת לֹֽא־תִבְנ֗וּ וְזֶ֤רַע לֹֽא־תִזְרָ֙עוּ֙ וְכֶ֣רֶם לֹֽא־תִטָּ֔עוּ וְלֹ֥א יִֽהְיֶ֖ה לָכֶ֑ם כִּ֠י בָּאֳהָלִ֤ים תֵּֽשְׁבוּ֙ כָּל־יְמֵיכֶ֔ם לְמַ֨עַן תִּֽחְי֜וּ יָמִ֤ים רַבִּים֙ עַל־פְּנֵ֣י הָאֲדָמָ֔ה אֲשֶׁ֥ר אַתֶּ֖ם גָּרִ֥ים שָֽׁם׃
‹Huwag din kayong magtatayo ng bahay, ni maghahasik ng binhi, ni magtatanim ng ubasan, at hindi kayo magkakaroon ng alinman sa mga ito; kundi sa mga tolda kayo maninirahan sa lahat ng inyong mga araw, upang kayo ay mabuhay nang mahabang panahon sa ibabaw ng lupa na inyong tinitirhan bilang mga dayuhan.›
Akeidat Yitzchak
We are told by the Midrash that G'd gave Israel three gifts, all of which were acquired through some deprivations. 1) Torah. 2) The land of Israel. 3) olam haba, eternal life in the hereafter.(Shemot Rabba 81) The scriptural proof for this quoted in the Midrash mentions deprivations yissurim in each case. These gifts are ours only if we practice a measure of self restraint. If, in the pursuit of Torah, someone becomes so one-sided that he neglects his debt to society, or fails to appreciate the world around him, he is guilty of Solomon's famous dictum "do not be too righteous." (Kohelet 7,16) Even Torah knowledge can be retained only through continence and self restraint. The Talmud says that every new born baby forgets all the Torah it has learned in the mother's womb, due to an angel striking it at the moment of birth. (Nidah 30) The idea behind this is as follows. While within the mother's womb, the fetus receives exactly what it needs, no excess. Under such conditions it can absorb Torah without impediment. When transferred to our world, these conditions change, and the pursuit of the physical, material, interferes with the acquisition of the spiritual values. The gift of olam haba is received via yissurim because the whole object of mussar, the root of the word yissurim, is to pave the way for life. Olam haba is life in its ultimate definition, attainable, naturally only via such a route. If one may be allowed to oversimplify, morality is nothing but a form of self restraint. In Jeremiah chapter 35, Yehonadav ben Reychav is held up as a shining example of someone who instructed his family to practice the noble art of self restraint concerning a variety of physical pleasures and material acquisitions. In appreciation of that family's having heeded their patriarch's instructions, G'd assures that family that they will provide leading personalities for the Jewish people for all future generations. Arichut yamim, longevity, is defined by our sages as participation in the life which is kullo aruch, of an unending infinite duration. The chapters of the Torah legislation dealing with the shemittah, yovel, ma-asser priestly gifts etc., are aimed at teaching us to practice self restraint when exploiting the bounty the land has to offer. The owner who wants to sell his slave at a good price, will overfeed him prior to the sale, to create the illusion that the slave is in good health and physical strength in the eyes of the prospective purchaser. The negative effects of that slave having been force-fed, will show up only after the sale has been concluded. A father who does not wish to part with his sons, will raise them on the kind of diet that assures their continued well being, and that builds up a resistance against harmful foreign elements in their bodies. (Deut. Rabbah 3) The menorah, candelabra in the tabernacle, was made with beaten gold. The trumpets were made out of beaten silver. The two cherubs on the lid of the holy ark were made of beaten gold. We observe that the purity of these vessels was achieved only after they had been hammered. Only then did the respective raw materials assume its enduring format. The trumpets represent the gift of the land of Israel, since they were employed to herald the Jewish people's approach towards that country. The menorah represents the gift of Torah, spiritual illumination. The cherubs symbolise olam haba, the world in which the angels abound, a world of the spirit, ruach.