One day, a yachtsman anchored off a small island. As he stepped ashore, he heard a strange ‘mo, mo, mo’ sound. He followed the sound and came across an old man sitting in a clearing. ‘What are you doing?’ the sailor asked. ‘Meditating’ said the old man. ‘Oh, you’ve got it wrong. You should say ‘Om’. The old man thanked him: ‘That’s very helpful.’
Later, as the yachtsman sailed away, he heard a shout. Turning, he saw the old man coming towards the boat, walking on the water. ‘Wait’ shouted the old man. ‘What was that word again?’
(An oldie – but a goodie)

