Imagine this

you are standing on a crumbling cliff, that cliff is your life, once that cliff falls, that is your death, and your cliff is built on stones of sin, if you stay on that rocky, falling cliff you fall into the chasm below, hell. However, on the other side of the chasm, is a sturdier cliff, a cliff built in holy stones!
That cliff is heaven! People think that there are many ways across, things such as good works, religion, money, and morality, however, those are all bridges that won't ever reach quite to the other side. think of it this way: you are a rag, dirtied with sins, doing good works, being Religous, and having good morality are like trying to clean stuff up, but since you are a dirty rag, your not really washing anything away! There is only one way across the road to heaven, and that is through christ's payments. he died for your sins, so you could be washed clean, if you turn away from your sin, and accept gods gift, you can walk straight onto the road to heaven.