Mark 13, often referred to as the Olivet Discourse, is a pivotal chapter within the New Testament, dedicated primarily to eschatology (the study of the end times) and Christ's prophecies regarding future events. Spoken by Christ on the Mount of Olives, overlooking the holy city of Jerusalem, this discourse addresses two main themes: the impending destruction of the temple and the ultimate second coming of Christ. The disciples ask about the "sign when all these things shall be fulfilled", prompting Christ to deliver a profound sermon filled with prophetic warnings and descriptions of the tribulation to come. The chapter is dense with keywords like false Christs, wars and rumours of wars, and the abomination of desolation, providing a foundational text for understanding biblical prophecy.

Throughout the chapter, Christ interweaves immediate events with those leading up to the day of the Lord. He warns His followers about persecution, promising that the Gospel must "first be published among all nations" before the end can arrive. Christ emphasizes the necessity of endurance and faithfulness during a time of great distress, often called the great tribulation. He details cosmic signs, such as the "sun shall be darkened, and the moon shall not give her light", leading to the glorious "coming of the Son of man in the clouds with great power and glory". Ultimately, the discourse concludes with a strong, repeated admonition to "take heed, watch and pray", emphasizing spiritual vigilance and readiness rather than speculative date-setting.