Naruto Shippuuden (dub) Episode 238 -

Sai encounters an old man who reminds him of his past.

Represents his soul; the blank pages signify his lost childhood. Naruto Shippuuden (Dub) Episode 238

Essential viewing for fans who care about Sai's evolution beyond being a "Sasuke replacement." Sai encounters an old man who reminds him of his past