Therefore, since all these things will be dissolved, what manner of persons ought you to be in holy conduct and godliness...?
2 Peter 3:11
When Albert Einstein proposed his theory of relativity, it became an accepted fact that traveling into the future is possible but not into the past. That doesn't stop Dr. Who. The famous fictional character is the star of the longest running science-fiction television series in the world. He can travel into the past as easily as into the future.
Recommended Reading:
2 Peter 2:10-13
The best way to know the future for certain is to study biblical prophecy. You'll know more than Dr. Who! God has unfolded a vast amount of information in Daniel, Ezekiel, Zechariah, Matthew 24, 1 and 2 Thessalonians, and Revelation. In fact, the entire Bible is one-fourth prophecy.
God has given us this top-secret information about the future for several reasons—to inform us, to reassure us, to encourage us, and, perhaps most importantly, to spur on our growth in holiness. We want to live in a way that glorifies Him, should He come today. Today, let's remind ourselves that Jesus may come again before tomorrow's sun rises and sets. And let's live accordingly!
The end of creation is that the Creation might glorify [God]. Now what is glorifying God, but a rejoicing at that glory He has displayed?
Jonathan Edwards