Eckhart Tolle, author of A New Earth, says to be spiritual is to live in a state of openness. "With that openness, a far greater power comes into your life," he says. "So to be spiritual is to be in touch, connected with that dimension of depth in yourself."
Eckhart says you need to become more aware of the aliveness of this moment. "The aliveness that is all around you no matter where you are. And to become aware of that, you need to become a little bit more alert than you usually are," Eckhart says. "Increasingly, you become rooted in the aliveness and the fullness of the present moment. That's to lead a spiritual life."