My Philosophy lecturer once said,
Either there is a god who eternally rewards those who believe in him and eternally punishes those who dont or there is no such god.
If I dont believe in Him and he does exist, I shall be eternally punished.
If I dont believe in him and he doesn't exist, nothing Good or Bad will happen to me.
If I believe in him and he does exist, I shall be eternally rewarded.
If I believe in him and he doesn't exist then nothing good or bad will happen to me
It is clear that I have more to lose from not believing and being wrong than from believing and being wrong
Therefore it is wise to believe