"By convention sweet is sweet, bitter is bitter, hot is hot, cold is cold, color is color; but in truth there are only atoms and the void."

or:

"We know nothing accurately in reality, but [only] as it changes according to the bodily condition, and the constitution of those things that flow upon [the body] and impinge upon it."

https://en.wikiquote.org/wiki/Democritus

Nothing like a little LSD to give a little insight to the world.

The mind isn't a learning device, it is a filtering device. Much along the same lines of "The web is a collection of everything we know. Still you'll be lost if you don't use a search engine to filter everything you don't want out"

No. We see things as they are observable through our senses. We're working with noisy and incomplete information, but still information that ultimately comes from the world rather than from us.