trailing clouds of glory
Can anyone please explain a bit about the meaning of the phrase "trailing clouds of glory"?
Context:
Our birth is but a sleep and a forgetting: The Soul that rises with us, our life's Star, Hath had elsewhere its setting, And cometh from afar: Not in entire forgetfulness, And not in utter nakedness, But trailing clouds of glory do we come From God, who is our home
(William Wordsworth)