What misfortunes was Kepler's life full of, and how did he spend it?

Kepler's life was full of misfortune. When he was young, he was sickly, with a half-disabled hand and poor eyesight. In middle age, his wife died and his son was seriously ill. All these experiences made him poor all his life, and he had to make a living by teaching and astrology. However, the tenacious Kepler was not crushed by the painful fate. He made great contributions to mankind with amazing perseverance.