I thank you all for your fast responses. This forum is really a relief.
A friend of mine, during a conversation some years ago about esoteric themes, said that he was thinking I would know a lot more than I was telling him. The fact is, that I don't really know or at least I don't trust what I think I know. [...] oO
Sometimes I simply feel that a statement is wrong but I cannot say what would be right and why. Also, I've realized that it happens quite often that I'm really influencing peoples decisions if I tell them my view. What if I get it all wrong? I'd prefer people making their own decisions (and discoveries). So I prefer to shut up most of the time. Or, I content myself to just spread some hints, hoping they'll find out by themselves.
I know I'll have to work on this.
Fortunately my friends are real friends. But when I try to express what I'm really experiencing, the conversations often starts to get awkward. They do not think I'm crazy or just inventing something, but I have the feeling that they can't really make a sense of it - and sometimes they get it completely wrong. It even occured to me that people get it wrong on purpose, because they just don't want to understand what I was saying.
phew - there's still a long way to go