Mama Younger is very spiritual. In her house, there is still God. Even though Beneatha has the courage to deny God's existence, in Mama's house, she comes to her senses when Mama slaps her across the face:
Mama and Beneatha argue because Mrs. Younger does not like the things Beneatha is saying, and feels her daughter is taking the name of the Lord in vain. Beneatha states her age, 20 years old, as proof of her right to speak the way she wishes, but her mother feels it has nothing to do with age.
Mama is a believer in God and her children must be believers as well. Mama is very strict about her religious beliefs. She has depended on God for her very breath. Mama will not allow her children to deny God. She will not allow them to speak of God in a disrespectful way.
Beneatha believes God gets too much credit for the things she has worked hard to achieve herself. When she vocalizes this belief, Mama slaps her across the face. Mama gives God total honor and glory for all the blessings she has in life. She gives God the credit for the very breath she breathes. She is totally dependent on God to give her strength to get out bed in the morning.
God is at the head of Mama's household. He is first in her life. Then her children are second. Mama is extremely spiritual. She is totally convinced that there is a God and his existence gives her a reason to get out of bed. She is in agreement with God's plan for her life. Her strong, spiritual background is evident in her strong, determination to survive:
Mama is clearly the source of the family's strength as well as its soul.
No doubt, Mama will give credit to God for her strength, heart, and soul. As for the conflict that a belief in God causes in Mama's house, there will be no disrespect of God. Mama will not tolerate disrespect of God in her house. When Mama slaps Beneatha across the face, Beneatha learns to keep her mouth closed about the subject of God and spirituality.