Quality versus Quantity
ונתנה הארץ פריה ואכלתם לשבע וישבתם לבטח עליה: וכי תאמרו מה-נאכל בשנה השביעת הן לא נזרע ולא נאסף את-תבואתנו: וצויתי את-ברכתי לכם בשנה הששית ועשה את-התבואה לשלש השנים
The land will give its fruit, and you will eat to satiation, and dwell securely on it. And if you’ll say: “what will we eat in the seventh year? Behold we can’t plant and gather our produce!” I will command my blessing for you in the sixth year, and the land will produce [enough] crops for three years
The beginning of parshas Behar discusses the laws of Shemittah, the Sabbatical year in the land of Israel. Every seven years, the land attains a special level of kedusha, holiness, causing a whole set of laws to come into effect. Among the many laws that apply during the Shemittah year, a major one is that all agricultural work is forbidden. The land of Israel is to lie fallow. Before the industrial revolution, this mitzvah was incredibly relevant to the entire nation (while they were living in the land). Most of the people were farmers, and essentially got a year off to focus on more spiritual matters.