I have come across a dilemma, I could not find the question on the site

I have come across a dilemma, I could not find the question on the site

I have come across a dilemma, I could not find the question on the site presently so I hope it has not been answered yet. If an atom is the smallest piece of matter that we are aware of, doesn't some form of matter have to make up an atom? And whatever the form of matter that makes up an atom, would have to be made up of some other form of matter and that matter would have to be made up of a kind of matter as well, and on and on forever. Where does that stop? How can a human being ever comprehend something like this? Thank you.

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