Vaclav has said goodnight to Lena every night since the night she went away. Out loud. In a whisper. [...] He filled the words with all his love and care and worry for Lena and launched them out to her, and like homing pigeons, he trusted them to find her.

Lena's real mom, Emily, knew that this was not the truth, but she also knew that Vaclav was not lying.
Vaclav knew that he was telling the truth.
Lena knew that it was a lie, but she loved it and believed it, like a fairy tale, like a song, like a bedtime story, like a magic trick.
She loved Vaclav until it became the truth and so it was.

When I first met you, that's what I remember. I looked up at the sky and thought, I'm going to love this person because even the sky looks different.

Ethan: I love you, I whispered in her ear.
She held my face in her hands and leaned back so she could look at me.
Lena: I don't think I could ever love anything the way I love you.

She loved her mother and depended on her mother, and yet every single word her mother said annoyed her.

Their friendship was only one aspect of their lives but it seemed to give meaning to all the others.