Revelance...

This is relevant to today's Christians because it informs us that Christ is coming again, and that we need to ready ourselves for His coming. We need to ensure that we praise God/Jesus with our life and that we were in someway the embodiment of our Christian values, because as it clearly states- Christ will come again to judge the living and the dead. And, as proven by the occurrence of the Pentecost and the Holy Spirit blessing the apostles, what was prophesied will take place.