Reading this article reminded me of an acid trip I had (thanks Steve Jobs), where I was completely surprised by how much was going on when the "filter" was removed and I felt as though I was able to look at what my subconscious was doing. I wrote a really long essay about it (unreleased), but I didn't feel all of it was relevant so I'll just summarize my thoughts here: I was pretty surprised at the depth of thoughts I could access when I tried LSD.

I was surprised at the speed of the processing: simple thoughts like "bike" would trigger an enormously long chain of associations and thoughts that would go all the way back to my childhood, and I would vividly recall pictures of my first bike, but even now when I try to think of it I have trouble recalling such vivid memories.

I'm not quite sure whether the LSD caused me to think more about things, or whether it simply removed a filter that otherwise would exist without the drug. Either way, I walked away from that trip thinking, "there's so much more going on up there than I realize."