"You are the light of the world", that's a responsibility. The world is going to be destroyed, but a new heaven and earth is going to replace it. The destruction of the world is the destruction of the spirit of this world. In this world (spirit of this world), you will find no peace, no rest, no good, no truth, but Jesus said "I have overcome the world".

We are called to be the light of the world by the power of God. Light comes from power, the power is the kingdom of heaven, Jesus Christ working in the children of God, in this world, as the light of the world. Let there be light!