The tragedy of not believing in God is not that you will miss heaven, it is not that you will miss the blessings of being a Christian, it’s not that you will and are wasting your life. It is those things but even worse it is that you have no God.
Ephesians 2:12 remember that you were at that time separated from Christ, alienated from the commonwealth of Israel and strangers to the covenants of promise, having no hope and without God in the world . This is the most hopeless situation anyone can ever be; it is the hopeless situation all people who have not believed in him through his son are living in. Because on the opposite side of the coin, having God is the greatest true blessing for a Christian in this life and the next. What a tragedy is it not to have God as you Father! To put it in other words, what a tragedy is it to have God as your enemy!
But good news is, John 1:12 to all who did receive him, to those who believed in his name, he gave the right to become children of God. And, John 6:37 all those the Father(God) gives me(Jesus) will come to me, and whoever comes to me I will never drive away. See the open arms of Jesus; look around and see how much you are missing without him, make a decision to receive his offer of himself.