What is role strain in sociology? Quick Answer. Role strain in sociology is when a particular role a person needs to fulfill is strained due to excessive obligations or multiple demands on time, energy or available resources.
The phrase God helps those who help themselves is a popular motto that emphasizes the importance of self-initiative and agency. The phrase originated in ancient Greece and may originally have been proverbial. It is illustrated by two of Aesop's Fables and a similar sentiment is found in ancient Greek drama.
(The rudeness, violence, selfishness, greed, etc  among humans, is a 'choice' they make, consciously or  subconsciously.)    Therefore 'one reason' why Christians 'believe' in helping others  is: Because Christians love Jehovah God and they desire to obey  Him.