Why is letting go of past sins important for Christians?

Christians are called to let go of past sins because holding onto them can lead to bitterness and hinder our spiritual progress. As Paul illustrates in Philippians 3, he refuses to let his past dictate his present or future. The idea is not to ignore or forget our past but to acknowledge that it is forgiven and that we have been made new in Christ. This release allows believers to embrace their identity in Christ, live joyfully, and focus on the spiritual race set before them without the weight of guilt and shame.