God’s own glory is uppermost in His own affections. In everything He does, His purpose is to preserve and display that glory. To say His glory is uppermost in His own affections means that He puts a greater value on it than on anything else. He delights in His glory above all things… God’s overwhelming passion is to exalt the value of His glory. To that end He seeks to display it, to oppose those who belittle it, and to vindicate it from all contempt.
John Piper