Advent starts with hope.
We look forward in expectation to Christmas, and we remember that there was a time before Christmas, a time before the Word-made-flesh, a time before the fullness of time. But we also remember that the hope that was fulfilled in Christmas is not really complete. We remember that the hope of God dwelling with humanity is not perfectly realized. The fullness of time is not yet fully, well, full.
For instance, regardless of what we would like to think about where we are at, it is obvious that our society has not yet realized racial equality. If Ferguson hasn't taught us that, five minutes on Facebook reading some of the innumerable asinine comments should. But there's plenty more. People starve to death. Tragedy and natural disasters still strike. Children are still raised in loveless homes, and families still struggle to get by. There is still crying and pain. There is still war and violence. There are still plenty of situations crying out in need of hope.
Jesus came and said that God's kingdom is at hand, but it hasn't come fully, on earth as it is in heaven. But we hope, because we have a God who acts. We hope, because Jesus came two thousand years ago to be God with us. And we hope, because Jesus - God with us - will come again.
Jesus said:
“In those days, after the suffering of that time, the sun will become dark, and the moon won’t give its light. The stars will fall from the sky, and the planets and other heavenly bodies will be shaken. Then they will see the Human One coming in the clouds with great power and splendor. Then he will send the angels and gather together his chosen people from the four corners of the earth, from the end of the earth to the end of heaven.” (Mark 13:24–27 CEB)
Some people might think that this doesn't sound hopeful at all. In fact, the first part of this might sound scary: it might even sound like bad news. The lights will go out - the sun, moon and stars will go dark, and the planets will be shaken. The planets might represent other supernatural heavenly forces that might oppose God's reign - other 'pagan' deities popular in the first century that Jesus' arrival puts in their place. Similarly, the sun and moon and stars often represented other gods, and often these even had political connotations: Pharaohs and emperors were often associated with the sun and other heavenly bodies.
But Jesus' arrival puts these in their place too - no other force can claim supremacy in the face of Jesus, no other king or nation or powerful institution or military force or president. All are put in their place. And this is surely good news for the poor, the suffering, the oppressed, the outsiders. These folks exist beneath the thumb of social and economic and political forces. So the good news is that Jesus comes in from outside of those, Jesus is different from these things, Jesus is no one's pet. Since Jesus isn't owned by the status quo, where the status quo seems to be working for evil Jesus can come in and disrupt it. This is not bad news at all!
But this is now a world without heavenly lights - no sun or moon or stars to provide light. This raises another question, with practical as well as metaphorical consequences: Does the darkness win?
The Human One comes on the clouds, clearly an intentional conflation of Jesus with the image of YHWH in Daniel 7, and the notion of God gathering his people from the whole earth has plenty more Old Testament echoes. God comes down, God's people are gathered together. By what light are they gathered, and by what light does this gathering live?
Isaiah and Revelation offer a clue:
“The sun will no longer
be your light by day,
nor will the moon shine
for illumination by night.
The LORD will be your everlasting light;
your God will be your glory.” (Isaiah 60:19 CEB)
“Night will be no more. They won’t need the light of a lamp or the light of the sun, for the Lord God will shine on them, and they will rule forever and always.” (Revelation 22:5 CEB)
The sun and moon and stars go dark, but the world doesn't go on in the dark - it goes on with God as its light. This imagery isn't meant to be terrifying, but hopeful. This isn't an image of the triumph of darkness, but of its ultimate defeat. This is the starting point of Advent. It starts with a call to hope.
And there are still plenty of situations crying out in need of hope. As Christians, those are the places where we are called to live.