The_Complete_Chronicles_of_Narnia_(volumes_1-7,_in_order_of_publication)

"Do you mean that is what you want me to do?" gasped Lucy.
"Yes, little one," said Aslan.
"Will the others see you too?" asked Lucy.
"Certainly not at first," said Aslan. "Later on, it depends."
"But they won't believe me!" said Lucy.
"It doesn't matter," said Aslan.
"Oh dear, oh dear," said Lucy. "And I was so pleased at finding you again. And I thought
you'd let me stay. And I thought you'd come roaring in and frighten all the enemies away
- like last time. And now everything is going to be horrid."
"It is hard for you, little one," said Aslan. "But things never happen the same way twice.
It has been hard for us all in Narnia before now."
Lucy buried her head in his mane to hide from his face. But there must have been magic
in his mane. She could feel lion-strength going into her. Quite suddenly she sat up.
"I'm sorry, Aslan," she said. "I'm ready now."
"Now you are a lioness," said Aslan. "And now all Narnia will be renewed. But come.
We have no time to lose."
He got up and walked with stately, noiseless paces back to the belt of dancing trees
through which she had just come: and Lucy went with him, laying a rather tremulous
hand on his mane. The trees parted to let them through and for one second assumed their
human forms completely. Lucy had a glimpse of tall and lovely wood-gods and woodgoddesses
all bowing to the Lion; next moment they were trees again, but still bowing,
with such graceful sweeps of branch and trunk that their bowing was itself a kind of
dance.
"Now, child," said Aslan, when they had left the trees behind them, "I will wait here. Go
and wake the others and tell them to follow. If they will not, then you at least must follow
me alone."
It is a terrible thing to have to wake four people, all older than yourself and all very tired,
for the purpose of telling them something they probably won't believe and making them
do something they certainly won't like. "I mustn't think about it, I must just do it,"
thought Lucy.