From the book ‘Treasures in Heaven’ …
What exactly is ‘glory’? In the Bible, there are examples of God’s glory appearing. For instance, in the Old Testament, God’s glory appeared at times as a cloud, at times as a shining pillar of fire. God’s glory is usually associated with a glowing or a shining. But those are just examples of how God’s glory appears. Not it’s essence.
Glory itself is the visible outward reflection of the inward nature and character of God.
Glory in general can be defined as a reflection of what is best and true about a person or a thing. For example, the glory of the bush is the flower. The glory of the stalk is the ear of corn. The glory of the tree is the apple. The glory of God is His love, His kindness, His mercy. These attributes and more reflect the truly wonderful nature of God.
1 Peter 4:14:
If you are reproached for the name of Christ, blessed are you, for the Spirit of glory and of God rests upon you. On their part He is blasphemed, but on your part He is glorified.