From 65438 to 0828, after graduating from Berlin University, Feuerbach became a lecturer at Irish universities. 1830 published the article Death and Eternal Life anonymously. As soon as this article against Christianity was published, it aroused strong social repercussions; Progressive men of insight clapped their hands and cheered, and the Christian church was terrified. The reactionary German authorities were furious. They immediately banned the article and traced the author's real name. When they learned that the author of the article was Feuerbach, a lecturer at an Irish university, they immediately rudely kicked Feuerbach out of school. Feuerbach was not discouraged by this. He continued to study hard and devoted himself to writing. From the standpoint of materialism, he criticized the religious theology and Hegel's idealism philosophy, which were dominant in the ideological circle at that time. He has published many books and papers, such as The Essence of Christianity, Criticism of Hegel's Philosophy and the Essence of Religion, which restored the authority of materialism and won a high social reputation. Many university professors and students want him to return to the university to teach. However, the reactionary authorities ignored all this and stubbornly refused to let Feuerbach return to the university forum.

Feuerbach is well aware of the despicable purpose of the reactionary German authorities. He told well-meaning people that to solve his "lecture problem, it can only be realized at the expense of political servility and religious ignorance", and he himself is a famous story about moral education.

I will not give up my anti-religious stance and bow to the reactionary authorities in order to return to the university forum. In order to be loyal to his beliefs, Feuerbach resolutely gave up the idea of re-entering the university to publicize his philosophical thoughts, and moved to the village of Brookburg in solingen on 1837. There, he lived alone for twenty-five years. Through living in the backcountry, he practiced his determination never to bend his knees to the Christian church and the reactionary German authorities, and showed his heroic integrity.