Articles
Hamel and Prahalad wrote two classics about strategy and the Future: Strategic Intent and Strategy as Stretch and Leverage. Available at www.hbr.org.
Books
One of my favourite books about Future is The Heart Aroused by David Whyte. It will guide you through the deeper waters of what you care about.
Another of my favourite writers about Future and Spirit is Harrison Owen. I recommend The Power of Spirit and The Spirit of Leadership.
Other books to consider are The Art of Possibility by Zander and Zander and The Highest Goal by Michael Ray