Can hide a post in the single post page, but not in the blog home page

I want to completely hide a post from strangers (visitors). I've read about using the "more" tag as a teaser, and I like the sounds of that, but for now I just want to hide posts completely.

I was able to hide posts in single post pages, but I wasn't able to hide them in the blog home page (see screenshots).

How do I hide them from the blog home page, too?