Our Savior is not in the grave, He is at the right hand of the Father. This is the major difference between Christianity and all other religions. The other difference is that our “religion” is a relationship and not just a belief. Yes, I believe in Jesus Christ as my Savior but I also have a relationship with Him because He came and died on the cross for your sins and mine. No other religious leader in the history of the world can claim this and all of the others are still in their graves.
God gave us faith to see a future with Him even when we can’t see it with our eyes. It is our faith that allows us to believe and know that our Savior lives! Jesus is the only way to heaven because it says so in God’s Word, so don’t turn away from His call on your life when you feel it, believe it, and know that He has provided you with an everlasting gift through your belief in Him.
Your eternity with God is a gift from Him to each of us through our faith in Jesus Christ. It is not a “religion” that someone made up or thought up or even dreamed up. In the two millennia since He went back to heaven there have been millions of people who have died for their faith in Him. Nobody would die for a lie, although in some cultures over the centuries many have given their lives for a “cause” that has no merit that compares to having faith in Jesus.