 built his own. And in fact, after 24 hours, he had built his own telescope with no instructions, no blueprint, nothing, grinding the lens himself, and so on. And when he had this telescope fashioned for himself, he did a revolutionary thing. He took it and he pointed it to the sky. And it's a simple act of almost incredible daring, the fact that he wanted to see what matters were hidden in the sky by the means of a device that could now give him a more powerful acuity and vision.