If we choose to believe and are right, we win eternal bliss. If we are wrong, we lose little. If we choose not to believe and are right we cannot win anything. -> Much to gain, little to lose - on should bet one Gods existence.
We humans are like prisoners in a cave seeing only shadows on walls of figures that are put before an artificial light source. -> The visible world of our constantly changing everyday experience cannot be the world of truth which is perfect and unchanging.