A storm system passing by. Dark followed by light. So, too, in this world we have troubles and the promise that they shall pass.
We are born to a fallen world.
We are born again into eternal life.
IF today, your world is dark and it looks like there is no light. Take heart, the darkness will pass. IT will flee in the Presence of the Lord.
[ Jesus Is the Light of the World ] Then Jesus again spoke to them, saying, I am the Light of the world; he who follows Me will not walk in the darkness, but will have the Light of life. NASB
Rejoice! Darkness will flee.