Up to verse 9 of Isaiah 53, we have seen the Arm of the Lord suffering an undeserved death that somehow is in the place of sinners. However, many questions about the work of God's Servant remain unanswered. Why did He have to die like this? Was He successful in His mission? What happens to Him now? Isaiah 53:10-12 comes along and answers those questions. In an abrupt change of tone from sadness to joy, we learn that the Arm of the Lord is triumphant because of His sufferings.