How do we know Christ's suffering was for our sins?

In Gethsemane, Jesus faced the horror of sin on behalf of His elect. He was made to be sin for us, meaning the judgment of God for the sins of His people was laid upon Him. This is a pivotal moment where Christ voluntarily accepted His role as the substitute for sinners. It is a deeply personal act of love, highlighting that His suffering was not for everyone in general, but specifically for those chosen by God before the foundation of the world. This is rooted in the understanding of divine election, where Christ's suffering is directly tied to the salvation of His people, indicating the profound nature of His sacrificial love.