In recent years, neuroscience has demonstrated why spiritual practices work. (Note: I like to refer to "spiritual practices" rather than "spiritual disciplines. Anyone can practice! Discipline sounds like ... pushups. I really hate pushups.)
As Daniel Siegel, author of Emotional Intelligence wrote in his book Mindsight: "How we focus our attention shapes the structure of our brain." Think about that one for a while. The practices you engage in every day change the physical structure of your brain.
Spiritual Tourism 101
8 months ago