At rest, the world is unfocused noise, shapes are abstract, at best. Words come rushing in, comforting, disturbing, mundane. The brain lights up, hanging on one idea while the next stumbles in, unannounced. There's coherent thought to be found in there, somewhere...   

And then you walk, suddenly the shapes make more sense, you feel your way around, you move indoors, and then back out, take a breath of fresh air infused with the smell of... is that eucalyptus?   

You stop walking, the world returns to garbled fuzz...

That is eucalyptus though, you can smell it clearly now