I do not know whether you have ever seen an eagle. In the zoo, of course, but I do not mean that. If you see an eagle in the zoo, most of the time it looks tired, bored and sleepy. For what shall he do? An eagle is meant to fly, and this he cannot do in a cage, at least not really well. What impresses me about eagles is their strength, and how they use their strength. You might think that such a large bird would move its wings in powerful beats. But the eagle does not need this. It circles in the sky, and even though it rarely moves its wings, it goes higher and higher till you lose sight of it. How does the eagle know that it can fly? If such an animal could speak, I suppose it would not discuss the existence of the air before spreading its wings. Eagles do not ask for proof. They are content with the experience that they are carried by the air. The outcome is their proof.