This, I find, is a symbol of a christian life. All the blue bricks are the people of the world and the orange brick is the christian that has to live amongst them. He knows that that they'll go to hell if they don't see God, so the christian ends up speaking out, for himself and for God. This is what makes us so unique.
Actually, the statistical probability of christianity being the true religion was calculated earlier this month and it is: 1 divided by the number of religions with almighty gods. Not very probable.