I need help understanding negative terms

Hi. Recently, I have been unable to grasp the meaning of negative terms (ie not, no, cannot, nothing, no one), or sentences with negative terms. I can use them perfectly fine. As in when I speak or write, the negatives come out naturally, but when it comes to reading or listening, I cannot understand it fully. I can gauge the overall meaning of the sentence with a negative, but I can't fully process it, it's hard to explain. I'm guessing I am overthinking it. But I wanted to ask, what goes on in your heads when you think of negative phrases, like, never, nobody, or nothing, or "nothing is impossible". Thanks in advance.