Mused

He mused about the complexities of human relationships while people-watching at the park.

He mused about the mysteries of the universe while stargazing in his backyard.

The children mused about what kind of adventures they would have on their vacation.

He mused about what his life would have been like if he had made different choices.

"The professor mused over the complexities of the theory."

He mused about the amusing observations in the stand-up comedy show.