Jesus said “I have come into the world as light, so that whoever believes in me may not remain in darkness”. The analogy of light and darkness is perfect, since darkness is merely the absence of light, rather than a physical property of itself. Without the gospel, the world remains unilluminated, without hope of the future, as Jesus also points out, “The one who walks in the darkness does not know where he is going”.
We have been given an amazing gift, part of a chosen race, with a responsibility to “show forth the praises of him who hath called you out of darkness into his marvellous light”. We are now God’s people, illuminated by His character and glory. It’s up to us to live in a way that shows that light to those around us, that they too may be part of God’s chosen people.