I think a better way of putting it is "Trust, but protect yourself in case you are wrong". As I wrote elsewhere, I think saying that you "absolutely trust" someone (anyone) is one of the most arrogant things you can say; you are not only saying you trust that person, you are also saying you don't believe you could be mistaken. Believe me, there is always room for a person to make mistakes.

I don't quite see how this is different from "say you trust, but act as if you don't", aka "don't trust, but lie about it".