This whole "up good, down bad" connection goes far beyond the words we use. Apparently, there's a wire somewhere between our eyeballs and our brains that takes this conceptual ladder and applies it to our actual judgment. Studies have shown that it's easier for people to recognize positive words if they're presented at the top of a computer screen as opposed to the bottom, and vice versa for negative words -- implying that we visualize their goodness in terms of their tangible elevation.
To see this in action, note the page location of most comments sections.
Crazier still is that negative emotions tend to drive our physical attention lower, which may explain that Charlie Brown stare-at-your-shoes mope-shuffle. And perhaps craziest of all, displaying a person's photo slightly higher than another's tends to make people identify that person as more religious, simply because his or her photo is displayed in slightly closer proximity to the Big Guy himself. Speaking of the Big Guy, there's a reason Renaissance painters depicted him up in the clouds firing beams of holy light from every orifice. That "light = good" connection is so hardwired into our brains that putting test subjects in a well-lit room made them more willing to donate money to charity than other test subjects, whom the researchers presumably locked in a dank basement.