Life after death?

I am really not in the position or authority to blog about this topic but a certain classmate of mine requested for this one due to her curiosity regarding this thought.

Many people are really intrigue if there is really life after we die on this earth. Many scientist cannot give explanations and answers to this mind blowing question which existed for many centuries already. But lets just tackle this thought on the basis of FAITH.
According to Christian belief, life after death is the promised paradise of God to the human race. Through the crucifixion of Jesus Christ on the cross we are already saved from our sins and we are guaranteed to own that eternal life once we leave our earthly body. In Bhutan, Hinduism believe that people are subject to process called incarnation wherein people who dies will be reincarnated in another form it can be an animal, a plant or another person by means of another birth. This process will continue until the persons will reach a certain level of karma. And for Buddhist, almost the same principle is in action until a person reaches holiness. But I am not particular to other religion for I myself is a born Christian.
Going back to Christian's belief, some documentaries in Discovery channel mentioned that eternal life is a gift from GOD himself and not a prize to be gain from doing good deeds. Pretty complicated right? haha. In other words, according to that documentary, it is only God who decides who are people to be saved, we cannot gain or obtain that salvation by means of doing good things such as charity, preaching good news or living the ways according to the bible. Another interesting thought of my uncle who is a born again pastor in their church, is that salvation is already within our reach. That we can really say that "when I die, I will go to heaven", and that is the GOOD NEWS that we should tell other people.
There are various beliefs and explanations regarding life after death, even I cannot cite which is which or what to believe but one thing is concrete and true that our life here on earth is not permanent and this life is not ours. This life alone is already a great gift, beyond that would be more than enough, so lets not waste our life doing worthless things and start sharing and live with love.