As he leaves the temple, one of the disciples admires the huge stones and buildings. Jesus answers that not one stone will be left on another. Later, on the Mount of Olives, Peter, James, John and Andrew ask when this will happen and what the sign will be. Jesus warns that many will come in his name and deceive many, that there will be wars, earthquakes and famines, but that these are only the beginning of birth pains. The disciples will be handed over to courts and beaten, and will testify before rulers; the gospel must first be preached to all nations. When they are arrested they should not worry about what to say, for the Holy Spirit will speak through them. Families will be divided and his name hated, but the one who endures to the end will be saved.
Jesus speaks of the abomination of desolation standing where it should not, and tells those in Judea to flee to the mountains without turning back. It will be a tribulation such as has not been since creation, and for the sake of the elect God will shorten it. He warns against false christs and false prophets who will perform signs; the disciples must be on guard because he has told them in advance.
After that tribulation, the sun will be darkened, the moon will not give its light, the stars will fall and the powers in the heavens will be shaken. Then they will see the Son of Man coming in the clouds with great power and glory, and he will send his angels to gather his elect. With the parable of the fig tree he teaches them to discern that the end is near, and affirms that his words will not pass away. He declares that no one knows the day or the hour, neither the angels nor the Son, but only the Father, and he closes with the parable of the doorkeeper: stay awake, for you do not know when the master of the house will come.