How do we know Jesus was our substitute in Gethsemane?

In Gethsemane, Jesus prayed fervently for the cup of suffering to be taken away, which reflects His deep understanding of the impending burden of sin that He was about to bear. As noted in the sermon, He had no sins of His own; therefore, His anguish was for the sins of His elect. The passage emphasizes that He was made sin for us, demonstrating His role as our representative and substitute. The agony He experienced indicates the gravity of what He was to endure on our behalf, confirming the truth of His substitutionary atonement.