From Blaise Pascal:
If you “bet” on the existence of God and find at death he does not exist, you have lost very little. But if you “bet” instead on God’s nonexistence and discover at death that God does exist, then you have lost everything eternally.
Graham Tomlin comments:
The wager is designed to blow the myth of neutrality out of the water… Pascal has brought his interlocuter to realize that he is an unbeliever not because Christianity is inherently implausible, but because he simply does not want to believe. It is not lack of proofs, but a deeply irrational distaste for the foolishness of Christianity which prevents his conversion… “your inability to believe derives from your passions,” rather than from any intellectual difficulty. The real origin of this decision not to believe is not solid intellectual objection, or the inherent irrationality of Christianity, but an irrational and unfounded prejudice, based on an inability to see the truth of Christian faith. The problem is not lack of evidence but sin.
Taken from Tim Chester and Steve Timmis, Total Church, 168.