It's easy to look externally for the truth. Look at what the Web has done for us.
Now, that's a different matter.
A thought arises; but how often do we question it? In essence, it's nothing more than a symbol.
I used to think that by changing my mindset -- positive to negative -- I'd somehow be freed from the tyranny of obscurity, but that in itself was just another thought.
Before you discount the idea of questioning if your internal thoughts are true, ask yourself what is it that's making you suffer. It could be physical but more likely it's the way you see or interpret the world.