The Torah states in no uncertain terms that we must return the land by Yovel, "Ki Li Kol HaAretz; Hashem owns all the land." (Behar 25:23) Rav Yeruchom Levovitz, the Mirrer Mashgiach, writes (see also MiShulchan Gavoa), that the whole point of Shmitta and Yovel is to make people understand that everything they have is only temporarily, and they are not the real owner. No one will live forever.
Rav Yeruchom tells of a Din Torah before Rav Chaim Volozhin where two people were fighting over a piece of land. They were both stubborn, and neither one was willing to listen to any compromise.
Rav Chaim then turned his ear down to the ground as if her were listening to what the ground was saying. He then turned to the Baalei Din and said after hearing both your arguments. "I wanted to hear what the land in dispute has to say. And do you know what it said? It said, 'Why are they both fighting who owns me? At the end, the two of them will both belong to me!"
אל תפספסו: טיפ וסגולה ליום מוצלח // י"ט באייר
The Torah Discourses of the Holy Tzaddik Reb Menachem Mendel of Rimanov
The Polish-Catholic Count and the Rebbe-an anecdote about Rabbi Menachem Mendel of Rimanov whose yarzheit is today.