EXOD880 The Kli Yakar, a biblical commentary, comments on this verse. [Exodus 23:11] that “the purpose of the law is to teach us not to regard man as absolute lord over the produce of the land, and that one is required to have faith in God that he will provide adequate crops in the sixth year, not only for that and the seventh year, but also for the eighth, until the new harvest is gathered.” Kil Yakar. This idea of trust in God to provide adequately for all of man's needs permeates many mitzvot, such as the free loan requirement, the allocation of time for studying Torah, and the extensive obligations of charity. The Sefer Hachinuch, explaining the same verse, adds “This teaches us the attribute of voluntary renunciation of property and the resultant generosity which flows from this attribute. [since in the sabbatical year the land was ownerless and its fruit public property]. Man learns from this mitzvah that there is an owner to the earth who produces his fruits, and at His will they become ownerless. Furthermore, this renunciation of the fruit of the land teaches us faith and trust in God. A man who, at the Divine commandment regularly relinquishes his ownership over his land for this year will never lack for trust in the bounty of God. Sefer Hachinuch.