Bismillahirrahmannirahim- In the name of God, the Beneficient, the Merciful.
God is a matter of belief, either you have it or you don't. In one of the verse in the Holy Quran it is stated: To you your religion, to me mine.
Now the question is : Is there any difference between those who believe and those who don't?
Of course there is. Suppose there is a God and there's heaven. Those who believe in the correct God and who good things may go to heaven. Those that do not believe may not enter heaven. This statement may appear a bit childish to some people but try to ponder/reflect on this. It may be beneficial in the long run. To those that are logical may want to have a safe bet.