Jo Marchant: High in the mountains of northern Colorado, a 100-foot tall tower reaches up through the pinetops. Brightly coloured and strung with garlands, its ornate gold leaf glints in the sun. With a shape that symbolises a giant seated Buddha, this lofty stupa is intended to inspire those on the path to enlightenment.

Visitors here to the Shambhala Mountain Centre meditate in silence for up to 10 hours every day, emulating the lifestyle that monks have chosen for centuries in mountain refuges from India to Japan. But is it doing them any good? For two three-month retreats held in 2007, this haven for the eastern spiritual tradition opened its doors to western science. As attendees pondered the “four immeasurables” of …

Many people see meditation as an exotic form of daydreaming, or a quick fix for a stressed-out mind. My advice to them is, try it.

Meditation is difficult, at least to begin with. On my first attempt, instead of concentrating on my breathing and letting go of anything that came to mind, as instructed by my cheery Tibetan teacher, I got distracted by a string of troubled thoughts, then fell asleep. Apparently, this is normal for first-timers. Experienced meditators will assure you that it is worth persisting, however.

“Training allows us to transform the mind, to overcome destructive emotions and to dispel suffering,” says Buddhist monk Matthieu Ricard. “The numerous and profound methods …