I know that in our day this seems like a wildly unpopular to claim that Jesus is the only way to God (and thus the only way to Heaven). To be sure some would call this sheer arrogance to say in our day of toleration that having one way through which humanity might come to know God is arrogant. I doubt that it is. To be honest, I think it is more arrogant to assume that there are multiple routes to God.
Some people use the old story about a village of blind men trying to discover the nature of an elephant. One feels the leg and says that the Elephant is like a tree, one feels the trunk and says the elephant is like a snake and so on and so forth. Eventually they all argue because they have only felt pieces and not the whole. Thus a person might say that all religions sense a part about God, but none of them see the whole and thus they argue… The problem is that the one making the assertions is claiming to be able to see the whole elephant. Thus at the end of the day they insult all the religions and really don’t provide a clear way forward.
A similar explanation is to say that God is at the summit of a mountain and there are many roads to get there. In essence all spiritual paths lead to God. Again the arguer doesn’t come from any of the paths just described. They just merely claim to be able to see what no one on any of the paths can see. Again in the name of tollerance they put forth a view that is actually the most intollerant.
The truth is that God has made a way for people to know Him through Jesus Christ. While that their is only one way, the way is open to all who would come. Regretfully some people will not come to Christ and they will miss out on knowing God and experiencing heaven.
Thank you for coming to us when we could not come to you. Thank you for opening up the door to knowing you and eternal life. Thank you for Jesus who stood in our place and made the way for all who trust him.