Is there any embarrassment or obligation in the statement of one who says: "I have expelled the worldly life from my life," and is it considered a contradiction if he thinks about worldly matters? And is there any suspicion of polytheism in his saying to someone: "Burn the newspapers and you will have a great reward," and is there any problem in describing the reward as "great"?

You are afflicted with waswasa (obsessive whispering). So, divert your mind from it and occupy your time with learning, earning, and inviting to Allah. Seek out righteous companionship and pay no attention to the devil's fantasies. One whose Islam has been established with certainty does not lose it except with certainty. A Muslim does not become a disbeliever except through a statement, action, or belief that the Qur’an, Sunnah, or scholarly consensus has indicated to be major disbelief. Nevertheless, a specific individual is not declared a disbeliever unless the conditions for takfir are met and its impediments are absent, such as maturity, sanity, and free will. And one afflicted with waswasa does not possess free will.