Why is understanding the flesh important for Christians?

The flesh symbolizes the sinful nature that all humans bear as a result of the fall. In the sermon, the preacher discusses how like Peter, all believers have a 'little Peter' within them, showing the constant struggle against sin and the flesh. Matthew 26 indicates that the disciples believed they could remain faithful in their own strength, revealing a misunderstanding of their weaknesses. Recognizing this helps believers understand their need for God's grace and the empowering work of the Holy Spirit in sanctification, as it reminds them that apart from Christ, they can do nothing (John 15:5).