Faith is a concept that both unbelievers and believers can struggle with. This part of the book of James tackles the question of faith head on, showing that genuine faith will be seen and shown by deeds. No deeds will mean that there is no faith present or even that we have the faith of demons (whose belief in God leads them to do no more than quake in their boots!).  So how do faith and deeds sit together? James points to the examples of  Abraham and Rahab so that we might know!