"Okay, good. Now. Think about all the things that trouble you, that make you anxious."

John is pretty sure there's quite a few in Ianto's case. He makes sure his hold on Ianto is secure, in case he starts to flail and panic.

"You're on a Ferris Wheel, and it's lowly taking you up. Above you, there's a storm gathering."

Stick with him here on the Ferris Wheel thing. He's trying his best. He's not exactly a trained meditation teacher or anything, after all, he's going off vague half-remembered things from a long time ago.