...some part of his brain does seem to be convinced that letting himself fall in love with Carissa, as much as that looked the courageous act of living your own best life and not backing away from that out of simple fear, on the surface appearances of things, was actually a huge mistake.
Keltham floats the internal argument that, if so, he has in fact already now made that mistake and might as well go all in on it, and that what comes of it will come.
...it lands a little, maybe.