Matthew 24 and 25 are well-known chapters in which we find a speech by Jesus, which he gives in the closed circle of His disciples. Some translations have written above chapter 24: Discourse on the last things (NIV/Telos). In the English-speaking world, this section is best known as: The second sermon on the mount.
Kingdom
The latter name links this argument of Jesus to His earlier Sermon on the Mount, which we find in Matthew 5 and 6. Both speak about the coming and establishment of the Kingdom (Matt. 5:3, 6:10, 24:14, 25:1 ,34). The fact that Jesus gives these speeches on a mountain is therefore illustrative, because a mountain is a model for the King (Rev.17:9-10), or the Kingdom. A mountain is a high place and it is a representation of how the Kingdom of Heaven will be established from heaven on earth (Dan.2:44-45).
Matthew 24 and 25 describes the transition from this evil aeon to the aeon to come.