How do we know we worship the true God?

The assurance of worshiping the true God lies in His sovereignty and unchanging nature. As stated in Psalm 138, our God reigns in the heavens, doing as He pleases, unlike false gods which are powerless. He is the holy and just God, who is merciful and faithful to His promises. God has declared that He will not lie or change His mind (Numbers 23:19). This assurance of His character solidifies our confidence that we worship the true God, which is demonstrated not only in His sovereignty but in His everlasting mercy toward His chosen people.