How do we know that Christ must suffer?

In Luke 9:22, Jesus articulates that it is essential for Him, 'the Son of Man,' to suffer many things, be rejected, and ultimately be slain. This prophetic declaration aligns with the overarching narrative of Scripture, which reveals that the Messiah must bear the penalty for sin to provide true salvation for His people. The Old Testament prophecies, including passages from Isaiah, foretell the suffering servant who would take on the sins of many. Therefore, understanding His suffering is crucial to grasping the fullness of the gospel and its implications for our salvation.