The Baal Shem Tov taught that if you want to check how much you actually believe in Hashem, check whether you find yourself coveting.
This is also the test of how much ahavat Yisrael (love of your fellow Jews) you possess.
If we truly believe in Hashem, then we trust that Hashem gives each of us exactly what we’re supposed to have, no more nor less. Such trusts allows us to abandon all thoughts of coveting. What’s more, when we love our fellow Jews, we will truly be happy for everything good they have. ~ R’ Sholom Brodt