2 Peter 3:10
But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up.
We should prepare ourselves for Christ’s coming, for we know now when it will come. There are several popular theories out now about the time frame of the end of the earth. And that is just what they are, theories. Jesus said that only the Father in heaven knew the time of his second coming. Knowing this we need to prepare ourselves today. For we never know when the time will come and we meet Christ.