Spoiler Alert! Usually that means that a key pivotal point in a story will be revealed. If you don't want to know, don't listen. Jesus, however, in His Mercy, gives us a clue as to what's going to happen in the future, the end times, the last days. The word "Apocalypse" comes from the Greek apokalupsis, which means to "uncover" or "reveal". Hence, God gave us the Book of Revelation. Mark 13 actually ties Revelation with the Old Testament prophecies. Seek the truth...