The spiritual life can be lived in as many ways as there are people. What is new is that we have moved from the many things to the Kingdom of God. What is new is that we are set from from the compulsions of our world and have set our hears on the only necessary thing. What is new is that we no longer experience the many things, people, and events as endless causes for worry, but begin to experience them as the rich variety of ways in which God makes his presence known to us.
Indeed, living a spiritual life requires a change of heart, a conversion. Such a conversion may be marked by a sudden inner change, or it may take place through a long, quiet process of transformation. But ti always involves and inner experience of oneness.
Making All Things New, Henri Nouwen quoted in A Guide to Prayer for Ministers and Other Servants