"In creating Childe Harold, Byron improved the quality of his own life and made an image that was better than he; Byron calls himself nothing and says Childe Harold is more. In Lines 52 through 54, Byron and Childe Harold are "mixed" and "blended" together. This relationship carries through the poem; whatever Byron says of Childe Harold, he also says of himself."
This shows that Byron told stories of himself through Childe Harold and his character became a reflection of him.
-M4GUS