Every religion, every culture, every person has a path that leads them to the deeper meaning of life. Buddhists take the "strive for perfection" root. Similarly, Hindus hope that if they do enough good, they can be born into a higher Caste than their previous life. Mormons, Jehovah's Witnesses, and Muslims are also centered around good works to push them further into the after-life. It seems to be a theme among religions: do enough good to outweigh your bad, and maybe, if you were successful in your quest for excellence, you might get into the place you want to go. The final decision will forever be up in the air, though, at least until your death.
Christianity is strikingly different from these religions, however. It is the one faith that puts complete trust in a deity outside yourself to save you from death. It requires no action other than the confession of belief. In fact, it specifically claims that Jesus, and He alone is good enough to procure a place for you in heaven, and once you believe, your eternity is secured. This is a vast change from trusting in yourself to do everything for a possible chance at making the cut.
Not only does Christianity guarantee salvation, it gives you the tools to truly be good, to truly help others. Nobody can really be good or righteous, no matter how hard they try, yet when you except Christ, He gives you the Holy Spirit. The Holy Spirit radically changes how you think; He frees you from hate, jealousy, rudeness and the like so you can love others without any hindrances.
If you enjoy working only for yourself, and are not constantly discouraged by your failure to outweigh the bad with the good, you would find happiness in any of the religions mentioned earlier. Unfortunately, you would still be unsure of your spiritual situation in "Nirvana" or heaven.
In my opinion, life is too short to live without assurance of your eternity, and life with Christ is an opportunity too valuable to pass up.
