Final answer:
The claim that Christian life must be done alone is false; Martin Luther's teachings during the Reformation emphasize faith and community, and Christian doctrine supports the idea of believers living and working together in faith.
Step-by-step explanation:
The statement that we need to realize we have to do the Christian life alone would generally be considered false. In the context of Christian doctrine, particularly as informed by the Reformation and Martin Luther's teachings, individual faith is paramount, but community support and fellowship are also key aspects of Christian life.
Luther's concept of 'Faith Alone' posits that salvation comes through faith rather than good works alone, but this does not negate the role of the Christian community. Luther also underscores the importance of supporting the poor and needy -- actions that reflect the communal spirit of Christianity.
Furthermore, the concept of a 'pure spiritual Christianity' implies that there is a collective aspect of practicing faith. The well-known phrase 'city upon a hill' from early American Puritan imagery similarly conveys the idea that a community of believers should collectively embody the values of their faith, setting an example for others.