Three yogis are performing a meditative vigil in a cave high in the Himalayas. One day there is a sound outside of the cave. Six months later one of the yogis says, “That was a tiger.” The cave is silent once again. About a year later, another yogi says, “That wasn’t a tiger, it was a lion.” Again the cave falls silent. About two years later the third yogi says, “If you two don’t stop arguing, I’m leaving.”