Sometimes, I stand on a bridge and admire the railroad tracks below. Strange as it may sound, I marvel at how straight they are. At the human ingenuity that invented the technology to mine iron, process it, and then cast it into rails. And to arrange them to form a perfect line to the horizon. It makes me optimistic about our future – it’s like the rails are screaming at me: “Humans can do anything if we put our minds to it!”

(read the rest at blog.mental.garden/p/yo… )