Luke indicated that Jesus said (ὁ δὲ εἶπεν) that they should be aware (Βλέπετε) and not be led astray (ὴ πλανηθῆτε) because many people would come in his name (πολλοὶ γὰρ ἐλεύσονται ἐπὶ τῷ ὀνόματί μου). They would say (λέγοντες) that they were Jesus (Ἐγώ εἰμι) and that the end time was near (καί Ὁ καιρὸς ἤγγικεν). However, they were not to go after them (μὴ πορευθῆτε ὀπίσω αὐτῶν). There is something similar in Matthew, chapter 24:4-5, and in Mark, chapter 13:5-6, almost word for word. Mark said that Jesus began to tell them about people who might lead them astray (ὁ δὲ Ἰησοῦς ἤρξατο λέγειν αὐτοῖς). He told them that they should be aware, so that they would not be led astray or be misled (Βλέπετε μή τις ὑμᾶς πλανήσῃ). They had to be cautious, so as not to be deceived. Jesus said that many people would come in his name (πολλοὶ ἐλεύσονται ἐπὶ τῷ ὀνόματί μου) saying that they were the One (λέγοντες ὅτι Ἐγώ εἰμι). They would try to deceive them by leading them astray (καὶ πολλοὺς πλανήσουσιν). In Matthew, Jesus warned them against people who might lead them astray (καὶ ἀποκριθεὶς ὁ Ἰησοῦς εἶπεν αὐτοῖς Βλέπετε μή τις ὑμᾶς πλανήσῃ). Many people would come in his name (πολλοὶ γὰρ ἐλεύσονται ἐπὶ τῷ ὀνόματί μου) saying that they were the Messiah Christ (λέγοντες Ἐγώ εἰμι ὁ Χριστός). Matthew explicitly mentioned the Christ, but this was not in the other accounts. They would say this in order to deceive them and lead them astray (καὶ πολλοὺς πλανήσουσιν). Apparently, there were many deceptive Jewish messianic leaders who were saying that they were the Christ Messiah. John the Baptist was an example of a messianic leader in the 1st century CE. Other political Jewish leaders had messianic ambitions also, especially those who led the revolt against the Romans in the 2nd half of the 1st century. Jesus was warning against all of them. Have people tried to deceive you?
This is somewhat similar to the parable ending saying in Matthew, chapter 25:13, about the virgins at the wedding being vigilant.Mark indicated that Jesus said that they were to be aware (Βλέπετε) and alert all the time (ἀγρυπνεῖτε), because they did not know (οὐκ οἴδατε) when the end time (γὰρ πότε ὁ καιρός ἐστιν) would come. This was a simple message to be vigilant all the time because your end or the end of the world could happen at any time.
Gabriel told Daniel to listen to what he was going to tell him. This all would take place at a later appointed end time, when the wrath of God would be displayed. Then he went into details about the vision. The ram with the two horns represented Media and Persia. The male goat was the king of Greece. His broken horn represented the 4 people who took over after the death of Alexander the Great, Cassander, Lysimachus, Seleucus, and Ptolemy, the successors of Alexander. However, these 4 kingdoms would not be as strong as the first kingdom of Greece under Alexander.