reading the dawn treader again and again

after lucy says the spell to make the invisible visible, this is what happens:

"...she ran forward with a little cry of delight and with her arms stretched out. For what stood in the doorway was Aslan himself, The Lion, the highest of all High Kings. And he was solid and real and warm and he let her kiss him and bury herself in his shining mane. And from the low, earthquake-like sound that came from inside him, Lucy even dared to think that he was purring.

'Oh, Aslan,' said she, 'it was kind of you to come.'

'I have been here all the time,' said he, 'but you have just made me visible.'

'Aslan!' said Lucy almost a little reproachfully. 'Don't make fun of me. As if anything I could do would make you visible!'

'It did,' said Aslan. 'Do you think I wouldn't obey my own rules?'"

beautiful.