This question has been ask so many time most times by non Christian. Why some will also ask what is the use of serving someone you don't know if he truly exist. Let me answer this way life is full of miseries things we can't explain naturally which i believe everyone can testify to that. Many a time I hear people say there is no heaven or hell let me conclude with this, if I live an holy life on Earth and died only for me to discover that there is no heaven or hell my friends it will still be in my favour because I would have lived a responsible life on Earth rather for me to live anyhow and die, then I discovered that there is God and there is also heaven and hell my friends the lost will be for ever and it will be too late. Let make our choice Wisely. God bless us