[Joshua considers the offer for a moment, recognizing that this could be a lot to ask, and Revali's willingness to help is a sign of trust (to some degree, at least). Silent gratitude towards the gesture lingers in his tone as he explains the task at hand.]

Pray lend me some of your dreamotion. I can guide you through the process.

With it, I can bolster the barrier's stability. That should keep it intact even after I stop actively feeding it.

[As he awaits Revali's response, Joshua silently muses about the fact that the Rito didn't balk at being called his friend. Perhaps it's an oversight, but it's one that Joshua is happy to accept.]