A moment today while driving to the store late at night for cat food and Tums. I had started to slow for a red light when the light suddenly turned green. I didn't remember what gear the car was in, and so I reached down to rest a couple fingers on the top of my gearshift. Instantly, I intuited that the car was in fifth gear. And just as instantly, I thought, "I understand now how Helen Keller did it."