Raj Patel’s desk sits in a dusty, cement-floored nook in his garage, just beyond a parked gray Prius, near the washer and dryer. They are humble surroundings for a god.

“It is absurd to be put in this position, when I’m just some bloke,” Mr. Patel said.

A native of London now living on Potrero Hill in San Francisco, Mr. Patel suddenly finds himself an unlikely object of worship, proclaimed the messiah Maitreya by followers of the New Age religious sect Share International.

He was raised as a Hindu and had never heard of the group. He has no desire for deification. But he may not have a choice.

Mr. Patel’s journey from ordinary person to unwilling lord is a case of having the wrong résumé at the wrong moment in history. For this is a time when human yearning to find a magical cure for the world’s woes can be harnessed to the digital age’s instant access to a vast treasure-trove of personal information.