I used to think that a paranoid thought was the sign of mental illness, but I soon found out through experience and a few conversations with my psych nurse wife that some such thoughts are normal for most people. Put in another way: we are all slightly crazy.
The formation of our brain is so complex we cannot help it. During the coronavirus quarantine I brought a cake to a fellow octogenarian I hadn’t seen in a while. I put it on the table outside his front door. I was wearing a mask, and when he answered my knock, he wasn’t wearing one and made some motions with his hand. I thought he didn’t want to see me (paranoia), but put such thoughts aside, for the good Lord had my wife waiting for me in the car.
I could already imagine her reaction if I later told her my thoughts. She’s a blessing from above; I am convinced.
Civilization 