In 1828, Müller almost started working with Jews in England. But when he got there, in 1829, he fell ill. When he got better, he promises he would obey the will of God. He soon left London. He believed that God would provide for his needs as he did his Christian work. He became the pastor of a chapel in Devon. Soon after, he married Miss Mary Groves. While he was the pastor of the church, he would not take a regular salary. He also stopped renting pews for the church. He said that would give too much money to the wealthy.