How do we know Jesus Christ is central to the Gospel?

Jesus Christ is intrinsically central to the Gospel as the one mediator between God and humanity, as stated in 1 Timothy 2:5. He fulfilled the law perfectly, fulfilling all righteousness on behalf of His people. His sacrificial death on the cross satisfied divine justice, as He bore the sins of many. The direct access to the Father that believers enjoy is only through Him, providing assurance of salvation and standing in grace. The Gospel centers on His person and work, highlighting His essential role in the plan of salvation.