"When the author walks on to the stage the play is over.  God is going to invade, all right: but what is the good of saying you are on His side then, when you see the whole natural universe melting away like a dream and something else--something it never entered your head to conceive--comes crashing in; something so beautiful to some of us and so terrible to others that none of us will have any choice left?  For this time it will be God without disguise; something so overwhelming that it will strike either irresistible love or irresistible horror into every creature.  It will be too late then to choose your side.  There is no use saying you choose to lie down when it has become impossible to stand up.  That will not be the time for choosing: it will be the time when we discover which side we really have chosen, whether we realised it before or not.  Now, today, this moment, is our chance to choose the right side.  God is holding back to give us that chance.  It will not last for ever.  We must take it or leave it."  Mere Christianity

The Apostle Paul tells us:

Therefore God exalted him to the highest place

and gave him the name that is above every name,

that at the name of Jesus every knee should bow,

in heaven and on earth and under the earth,

and every tongue confess that Jesus Christ is Lord,

to the glory of God the Father. (Philippians 2:9-11)

It hasn't happened yet, but one day everyone will recognize Jesus for who he really is--the Lord of the universe.

Why doesn't God make it obvious to everyone now?  Why doesn't he write a message in the sky saying: "Jesus is my Son; worship him!"?

Lewis says the reason is that God "wants to give us the chance of joining His side freely."  If the choice was forced then it really wouldn't be a choice.  And without that free choice there is no love--only roboticism--artificial intelligence.

Lewis reminds us that one day God will make it obvious to all who Jesus is.  One day God will invade this universe, making his presence known, not only in the sky, but everywhere. 

Why is he waiting to invade?  2 Peter 3:9 says, "The Lord is not slow in keeping his promise, as some understand slowness.  He is patient with you, not wanting anyone to perish, but everyone to come to repentance."

God is giving us time right now to choose to follow Christ.  And if people choose not to listen to the God-man, Jesus Christ, what makes anyone think people would pay attention to a message written in the sky?

No, the message has already come in human flesh.  We must respond to that message and carry that message to others with whatever time God gives us.

Dear God, help me to make the most of the time you give to me here on this earth.  Help me to live like Jesus really is Lord, not just of the universe, but of my individual life as well.  Help my life to be such a good advertisement for Jesus that others will want to follow him.  Empower me by your Holy Spirit to communicate the message and love of Christ in word and in deed, with a sense of urgency and joy.  Amen.