" As much as I can, I avoid using the word "spiritual" altogether. I find it neither useful nor necessary nor appropriate in my work at the hospital bringing mindfulness into the mainstream of medicine and healthcare, nor in other settings in which we work[.] [T]o my mind, the vocabulary of spirituality creates more practical problems than it solves. [...] The concept of spirituality can narrow our thinking rather extend it.
[...] Perhaps ultimately, spiritual means experiencing wholeness and interconnectedness directly, a seeing that individuality and the totality are interwoven, that nothing is separate or extraneous, If you see in this way, then everything becomes spiritual in its deepest sense. Doing science is spiritual. So is washing the dishes. It is the inner experience which counts. And you have to be there for it. "

― Jon Kabat-Zinn , Wherever You Go, There You Are: Mindfulness Meditation in Everyday Life