The holistic approach has the view that we are spiritual beings in physical bodies; that we take on our physical form at our birth and return to the spiritual dimension after out death. It is important to get ourselves out of the hurly-burly of everyday life and to expand our state of awareness and consciousness by becoming more away or our own spiritual nature. People often suffer without realising it, from longing to connect to their own spiritual nature. Religious belief, prayer and meditation are the most well-known way to expand out awareness, consciousness and reconnect with our spiritual nature.
Often it is an intense shock of a diagnosis of a life threatening disease e.g. cancer that awakens people to the reality of their spiritual connection. For the rest of us, there are often fleeting moment of spiritual connection when we are in nature, when we meditate, when we pray or experience moment of intense joy, beauty or pain. Others feel the reality of the spiritual dimension through experiencing the loving presence of a loved one who has passed away, spirit guides or divine beings. The purpose of mediums is try to contact this spiritual dimension to provide evidence of life after death. For the skeptics amongst you Michael Newton's books the Journey of Souls and the Destiny of Souls may provide more evidence to support the idea of life after death and a the concept that we are spiritual beings in physical bodies.
Buddhists and Yogis believe that the material world and even our emotions are the illusion and that the spiritual dimension is the only reality. They maintain that our preoccupation with the material world stops us from experiencing the bliss and freedom of the spiritual dimension.
For myself, I believe we very much live in this material world with jobs to do, children to parent and bills to pay so I always try to have my feet firmly routed here on earth. While I am not religious, I find being aware of my spiritual self and actively trying to increase my spiritual connection as it nourishes me and give me a sense of perspective and peach of mind which I find reassuring in my everyday life. So while my feet are firmly routed here on earth my head is in heaven.