John 14:6, “I am the way, the truth, and the life. No one comes to the Father except through Me.”
Today is Christmas Eve, the eve before we celebrate the birth of Jesus. Jesus was born a human being because His life, death, and resurrection are the only means by which He could effect salvation. Christ, therefore, is the only way to salvation. This is not a hyperbole; He is literally the only way. This is offensive to a lot of people who desire to follow some other religion or make up their own as an amalgamation of pagan religions.
We live in an age where we are afraid to offend everyone, even to the point of diminishing and insulting the Gospel. We fear man more than we fear God. We fear the disapproval and ostracisation of man more than we fear He who can destroy both body and soul in Hell. Thus, we deceive ourselves when we say, “All religions are equal,” or, “There are multiple ways to God.” This is a snare webbed by the Devil, for Christ has made it irrevocably clear: there is only one way, which is through Jesus, to God the Father, to whom the Holy Spirit draws us near. As He says explicitly, “If you do not believe that I am He, you will die in your sins” (John 8:24).
Thus, as Luther says, “No one has the right to make his own way to God through his own devotion or works (Church Postil, sermon for the Sunday after Christmas on Galatians 4:1-7, LW 75:382-383). God did not create us that we may create our own self-deluded ways of salvation and righteousness. He has laid out for us the only way to salvation and righteousness in His Word, which is through Jesus Christ His Son.