The task is to make them known and get them used. And that is the purpose of this handbook. It is a purpose that you have helped fulfill by reading this book. These tools are now yours. And what you do with them is in your hands.
Nothing happens without being caused.
And the future has yet to be created. With these tools, you can help create it. The choice is yours. Prague, June 1, 1995. Prof. Dr. Josef WOLF, CSc.