To people who believe that there is more than one way to God, I always ask the same question: If that's true, please explain to me why Jesus had to die on the cross. If you can bring yourself to God through self-actualization, inner enlightenment, and removal of desire (Hinduism, Buddhism), if you get to God via a system of works (Islam, various cults), then why did Jesus have to go, give His life, and die in the manner that He did?
It's interesting to note that Jesus actually asked the question to His Father about this very thing. In the Garden of Gethsemane, on the day before He would go to the cross, we find this recorded in Matthew's Gospel: "And He went a little beyond them, and fell on His face and prayed, saying, "My Father, if it is possible, let this cup pass from Me; yet not as I will, but as You will.""(Matthew 26:39)
If a person could simply earn their way to Heaven through works or other means, I have a hard time believing God would not have taken this 'cup' from His Son. But He didn't. Jesus went to the cross via a brutal path, with those that He had done miracles for asked that a murderer be given to them instead of the Son of God (side note: the name 'Barabbas' means 'Son of the father' - it appears the crowd asked for the wrong Son of the father...)
On this Good Friday, remember that there is no other way God has designed for lost and fallen people to become right again in His sight than the cross of Christ. No matter what this pluralistically-minded world says, the cross of Christ still stands unique among all the world's religions. Even Gandhi once noted, "Of all the dispositions and teachings of thinkers and ethicists, the one doctrine that I have no sufficient counter for is Jesus on that Cross." He knew that no other religion has any other founder demonstrating the love for you and me than Christ does: "Greater love has no one than this, that one lay down his life for his friends."(John 15:13).
Below are two presentations I recently taught through - the first covers the sin that has separated us from God and the second covers all the glorious things that Christ's death has accomplished for undeserving people like you and me.
They'll show you what Good Friday is all about.