I made two takes of your line, although I made another wording that’s personally my favorite (labeled as PREFERED):
https://drive.google.com/drive/folders/1ytA9EU11nYZANGJYGB38D7wE5xNtRpsA?usp=drive_link
I think, to blend seamlessly with his other line, it needs to evoke that same sense of awe and wonder in his tone, which I think is effectively captured in the one I prefer. I think the concept that he is having his own “delusions of grandeur” is hilariously ironic.