Time travel is a leitmotif of science fiction; it's an imaginary wonder to go back in time to witness some important event or to go forward to witness what the unknown future has in store. In reality, we all travel through time (and space), but at the speed of 'life,' the speed of earthly existence involving seconds, minutes, hours, days, months and years. What I am today is not quite the same as yesterday. What I'll be tomorrow I can guess, but only God knows. God knows past, present and future!
Think about travelling through eternity, living in a place where time is not. First of all, to live in eternity is to live outside of the present universe. What's it like outside the universe? No time. No aging. No development. No, wait, that's wrong, there is development. There are things happening in eternity. The great One lives in eternity. The Almighty speaks. Angels exist. What do they do? They serve God. Some angels rebelled against God, the Bible says. So there is independence and freedom, even in eternity, in God's presence. There is what we call 'evil' outside the cosmos, but it has escaped into our world. So there are pathways between heaven and earth, so to speak.
Living in eternity means living with God, but with the imaginary possibility of living without God. Living in time means living without God, but with the possibility of going to Him. In eternity there is no death, beings there live forever. This world was created to bring death or cessation to reality. This world is the garbage dump of heaven.
[Naturally, we want to escape this world. We want to enter eternity. The Devil is not allowed back into heaven. We were made to draw the evil one out of heaven, to expose him, so to speak. Travelling through eternity is ourselves, perfected, with wings, awestruck at the creations of God.]
