[He's not quite trusting that this isn't some lie. After all, last he knew of Anakin, he was side by side with Obi-Wan but if it's a lie then it's a very convincing one. For the time being, he decides to give Anakin the benefit of the doubt.]

Then we are on the same side, working for the same purpose.

[Even if that purpose he assumed had to be put aside in this new world.]