How do we know that Rahab's faith was genuine?

The genuineness of Rahab's faith is confirmed by the self-denying acts that she undertook in response to her belief. According to James 2:25, she was considered righteous for what she did when she received the spies and sent them away. This act of faith required great courage, especially given the consequences she faced from her own people. Furthermore, her willingness to put herself in danger shows that true faith will always reveal itself through actions, confirming her trust in God's power and promise.