How do we know that salvation is solely through Christ?

Salvation in historic Reformed theology is understood as being exclusively through Jesus Christ, who is our only mediator and advocate. John 14:6 clearly states, 'I am the way, the truth, and the life. No one comes to the Father except through me.' This underscores that it is through Christ's atoning work on the cross that we are justified. Furthermore, Romans 3:24 teaches that we are 'justified freely by His grace through the redemption that is in Christ Jesus.' This redemption entails Christ fulfilling the law’s demands and bearing the wrath of God on behalf of those who believe. Our assurance rests not on our works or feelings but solely on the finished work of Christ.