I found Merlin so intense when he said it that it kind of scared me! lol But yes, his absolute conviction and belief that Arthur is going to be a great king is just perfect.

(also, on a completely shallow and unrelated note : every time I see Arthur's knights together, I have the giggles because I SHIP ALL OF THEM TOGETHER. It doesn't matter who it is, as long as they're sitting next to each other, I ship it.)