Which part of this excerpt from Charles Dickens’s A Christmas Carol shows that Scrooge is willing to work on improving himself?

“I am the Ghost of Christmas Present,” said the Spirit. “Look upon me!”
. . .
“You have never seen the like of me before!” exclaimed the Spirit.
“Never,” Scrooge made answer to it.
“Have never walked forth with the younger members of my family; meaning (for I am very young) my elder brothers born in these later years?” pursued the Phantom.
“I don’t think I have,” said Scrooge. “I am afraid I have not. Have you had many brothers, Spirit?”
“More than eighteen hundred,” said the Ghost.
“A tremendous family to provide for!” muttered Scrooge.
“Spirit,” said Scrooge submissively, “conduct me where you will. I went forth last night on compulsion, and I learnt a lesson which is working now.
To-night, if you have aught to teach me, let me profit by it.”
The Ghost of Christmas Present rose.
“Touch my robe!”
Scrooge did as he was told, and held it fast.