I feel like the whole world is controled, even yahoo answers. How can I be sure and trust opinions?

Well... personally, after many years of anti depressants not helping me- there was one that I tried when I was at a very low point in my life- and it helped a lot. One day I was determined to end my life in the near future, because I hated my life... and the next day, nothing really changed- aside from me feelings like it's not really a reason to hurt myself. And that even though my life's not perfect- I enjoy living, and could make them even more bearable.

However, I can say that what really helped me here, was me realizing my depression really is a subjective experience. Since I was depressed for such a long time, I thought the pessimistic way I saw the world represented the way it really is... the credit doesn't really go only to the meds. And meds are far from perfect.

There are also things that are really preferred over meds, even by the doctors selling them- like doing sports. It's supposed to be as helpful as anti depressants, but without the side effects... likewise with sleeping well, eating well, and seeing people (friends) regulary...

It's just that I'm personally unable to do any of these things- and it's much harder when I'm depressed.

The way I see it, the world is controlled by many things. I tend to suspect more when people say "you don't need the medicine/ CBT, you just need to think *positive*-- buy "The Secret" and read it, and everything'll turn out okay." Or "meds are bad, eat this special herb I have instead--- it's better because it's natural!" (you know what else is "natural"? venom!...)... or "Religion will save you"...

Many things have personal interests behind them. Then again, I tend to believe people who claim it helped them. We are all different, after all...

So how can you trust opinions?

I don't think you should trust opinions at all. I think you should feel comfortable to ask, doubt opinions, research things yourself, confront with people about the weak points in their opinions- and judge for yourself!

There is no need to trust a random stranger's opinion. If you don't trust something, question it, and look for answers- don't strive to trust things blindly!