Soliloquy

At this moment his soliloquy was interrupted by a grasshopper, which, in springing from a swallow that pursued it, fell into Chloe's bosom.

He thinks he's giving a soliloquy.

By the end of the semester I expect you to have memorized Hamlet's soliloquy.

At the end of the second act the main villain gave a soliloquy detailing his plans to attack the protagonist.

Yet if I were to say […] that Hamlet's soliloquy had been much over-rated, it would not be said, on this account, that I was unable to appreciate Shakespeare.

The feeling of Singleton's bosom grew heightened in its tone of melancholy, and a more passionate emphasis of thought broke forth in his half-muttered soliloquy:— ¶"How I remember as I look […]

Here is a very over-simplified example, this time expressed in the form of a subjective soliloquy rather than a computer simulation.