Distrust of finite objects

For a while, I've had a theory that people tend to be suspicious of something that holds a lot of information if they can't see the entirety of where that information is stored. It's why I prefer physical books to eBooks or Kindle; I like to see all the pages together. It also seems to be why Arthur Weasley told Ginny in the second Harry Potter book, "Don't trust something that thinks if you can't see where it keeps its brain."

This may also extend, partly, to why so many humans are distrustful of one another. Among other reasons, it may be because we know that people have whole worlds of thoughts contained within a finite body part, and we can't see the thoughts from the outside.

Unconditional love vs. unconditional trust

People tend to think that if you love someone unconditionally, then you're obligated to trust them unconditionally as well. But while love may not always be "earned," trust definitely is. I've heard it said that the best way to find out if you can trust somebody is to trust them. It's true, but if they proceed to betray your confidence, you're not obliged to continue to trust them out of love. That can turn into enabling.
              I'm not referring to romantic relationships. That type of love, while incredibly strong, is often built on the way your partner behaves. And even if the love itself is unconditional, the relationship isn't entirely so. I'm thinking more along the lines of family relationships; people you didn't choose to bring into your life but need to establish boundaries with, which can sometimes mean limiting or ending contact. Standing up for yourself does not mean you no longer love them.