There is only one way to know the answer to this question. No other person can answer it for you, although like many aspects of life, someone can show you how to get there. The truth is born through direct, personal revelation. That revelation will come to one who asks in sincere faith, that is, believing that their question will be answered. The revelation most likely won't come as a vision or miraculous dream, although it has happened -- for the vast majority of people, this personal revelation will come as a simple reassurance, felt in the heart and soul. And you receive this revelation, this gentle reassurance,
How do I know this? Because on several separate occasions I have personally received this revelation in my life in exactly the way I've described. I know that God lives. I know that Jesus Christ is His Son. I have no doubt of this, but I don't ask you to take my word for it. Instead, try it for yourself.