Dear Children, you are the future! YOU have to continue and you are responsible for what the adults have taught or left you. But is everything right and true, what the adults tell you and what you are learning at school? Much of it, yes, but many things remain unmentioned or many questions remain unanswered. When I was young as you are now, I did not understand a lot of what happens in the world. So I asked the adults: Where am I from? Who am I? What am I doing here? What is my future? Am I really dead, when I die? I often received surprised, even almost angry looks because of such questions. How dare the little one ask such nonsense?! I also asked: What is the sun? The adults and the teacher at school told me, that the sun is a burning ball and has been burning for millions of years. I asked: If so, why has not the sun burned out long ago? Why is the earth still spinning, when it's just a lump of matter in ro-tation? At school, in physics, we treated (later) the principle of uniformly accelerated motion. This principle says: A body is accelerated evenly, when a constant force acts on it. Otherwise, the body moved by an impulse comes to a standstill again. All right. I asked, WHAT is the first impulse, and then the constant force, that keeps the Earth's rotation and the burning of the Sun in constant activity? Someone in the class shou-ted: IT'S GOD!! And everybody laughed. So I try now to answer these and more qurstions for you in this little book. Lanoo