Mark 13:1-13 In this opening section of the Olivet Discourse, Jesus explains to his disciples that the grandeur of the temple would shortly be brought to ruin. The destruction of the temple was the first lesson of Jesus concerning the end of the Old Testament age. Therefore his disciples asked the question concerning further signs of the end of the age. Jesus replied with the Olivet Discourse, a long didactic section which explained the signs of the end of the Old Testament age and the Church age yet to come. He closed this first section with repeated instructions to his disciples to watch and endure.