Assure you, my good liege, I hold my duty as I hold my soul, Both to my God and to my gracious king.

As a response to a compliment, this might be a sort of charmingly fumbling way of saying, “Thank you.”
Accepting praise is a kind of skill, I think. I am not particularly adept at it. I either over-defer (“It had nothing to do with me. I’m just working with great people.” Or over-accept (“Why, thank you! I’m so proud of it myself!”) I feel there is probably some clever middle way that people who accept a lot of compliments work out, some charming combination of slight self-deprecation, with a hint of pride and pleasure and a shadow of inevitability. I’ve seen people do it. I might need to consciously study them to work out how. Also I might need a lot more compliments.