Answer: The argument between Beneatha and her mother Lena concerning God shows their radically different ways of looking at the world. Lena holds fairly traditional views, which was common with most women of her time. A devout Christian, she is someone who attributes all the good things in life, including Benetha’s future career as a doctor, to divine intervention.
Beneatha’s pretty fed up with her mother constantly invoking God. With her rationalist mindset, which is undoubtedly what has led her to want to pursue a career in medicine, she has no time for what she perceives as a childish, superstitious outlook on the world. For her, God isn’t real; he’s just an idea, an idea that she simply cannot and will not accept. Beneatha’s rejection of the Almighty is truly shocking and disturbing to Lena, but as Benetha rightly points out, this doesn’t mean that she’d going to go out and be immoral or start committing crimes. Her humanist values lead her to want to care for other people, not hurt them in any way.
But Lena can neither understand nor accept any of this. She responds by slapping Beneatha right across the face, a clear indication that this is her house, and that in her house there will always be a place for God.
Explanation: hope its helps