"You shall love your God" means that you should make the Divine Name beloved (Yoma 86a).
Rabbi Shimon ben Shatach once bought a donkey and found a gem in the carrying case which came with it. The rabbis congratulated him on the windfall with which he had been blessed. "No," said Rabbi Shimon, "I bought a donkey, but I didn't buy a diamond." He proceeded to return the diamond to the donkey's owner, an Arab, who remarked, "Blessed be the God of Shimon ben Shatach."
A non-Jew once approached Rabbi Safra and offered him a sum of money to purchase an item. Since Rabbi Safra was in the midst of prayer at the time, he could not respond to the man, who interpreted the silence as a rejection of his offer and therefore told him that he would increase the price. When Rabbi Safra again did not respond, the man continued to raise his offer. When Rabbi Safra finished, he explained that he had been unable to interrupt his prayer, but had heard the initial amount offered and had silently consented to it in his heart. Therefore, the man could have the item for that first price. Here too, the astounded customer praised the God of Israel.
We have so many opportunities to demonstrate the beauty of the Torah's ethics. We accomplish three mitzvos by doing so: (1) practicing honesty, (2) kiddush Hashem (sanctifying the Divine Name), and (3) making the Divine Name beloved, according to the above Talmudic interpretation of the Scripture.