Matthew 24:26-27

Jesus’ point in these verses was that His coming would be obvious to all rather than obscure. When He came, everyone would know it. Consequently the disciples would not need to fear missing the event, and they should not react to every rumor that it was happening. His coming would be as obvious as a flash of lightning that covers the heavens (Zechariah 9:14). It would be a public event, not something private that only the disciples or some small group would witness.