Much of our work is invisible and intangible. You cannot measure it by human means; and sometimes a period of silent reflection will accomplish more good than if the time had been spent in outward activity. Our work is immaterial where we are and what we do; the thing that matters is who we are and what we intend. Constant preoccupation with exterior work handicaps our knowledge of ourselves and of our intentions.
Speaking of spirituality, a Sufi master once said, "A river passes through many countries, and each claims it for its own. But there is only one river."
~from BEYOND RELIGION: 8 ALTERNATIVE PATHS TO THE SACRED by David N. Elkins