Acts 1: 8-11 tells the story of Jesus being taken up into the clouds right in front of the disciples before their very eyes.
While they’re watching him go up and disappearing into the clouds, suddenly two men dressed in white are there with them. These angels ask the disciples what they are looking at, which was amazing in itself, but then they made an amazing promise. This promise is for us too. “This same Jesus, who has been taken from you into heaven, will come back in the same way you saw him go.” Just as the disciples saw him go up into the clouds, so those on earth will see Him return someday.