I love her and that's the beginning and end of everything.

The line expresses an absolutist, romantic credo: love is presented as both the origin and the final justification of a life, a choice, or a story. Its blunt structure (“beginning and end”) compresses the whole arc of meaning into a single feeling, suggesting that analysis, morality, and consequence are secondary to devotion. Read in a Fitzgeraldian key, it also hints at the seductive danger of such totalizing love—how it can eclipse judgment and become a self-contained world, immune to evidence or cost. The sentence’s simplicity is part of its force: it sounds like a final answer, not an argument.