What is the proper way to confront a fellow believer about sin?

In Matthew 18:15, Jesus outlines a process for confronting a fellow believer who has sinned: 'If your brother sins against you, go and tell him his fault, between you and him alone.' This approach prioritizes personal relationship and reconciliation, emphasizing the need for humility and self-examination. The confrontational believer should first check their own heart, ensuring that they approach their brother not with a critical spirit, but in love, seeking their restoration. Additionally, this process involves making efforts to resolve the issue privately before escalating it to the church, reflecting the importance of maintaining unity and love within the body of Christ.