Of course Christ's presence is invisible. His coming and arrival is invisible too. Jesus is invisible. So the ridiculers ridicule the evidence of Christ's parousia.
This statement demonstrates that you are basing your understanding of matters upon Watchtower dogma rather than the scriptures. The Bible is clear in many places that Christ's return will be a visible event.
Mark 14:61,62: Again the high priest asked him, "Are you the Christ, the Son of the Blessed One?" "I am," said Jesus. "And you will see the Son of Man sitting at the right hand of the Mighty One and coming on the clouds of heaven."
Mark 13:24-27: But in those days, following that distress, "`the sun will be darkened, and the moon will not give its light; the stars will fall from the sky, and the heavenly bodies will be shaken.' "At that time men will see the Son of Man coming in clouds with great power and glory. And he will send his angels and gather his elect from the four winds, from the ends of the earth to the ends of the heavens.
Matthew 26:63,64: But Jesus remained silent. The high priest said to him, "I charge you under oath by the living God: Tell us if you are the Christ, the Son of God." "Yes, it is as you say," Jesus replied. "But I say to all of you: In the future you will see the Son of Man sitting at the right hand of the Mighty One and coming on the clouds of heaven."
Matthew 24:29-31: "Immediately after the distress of those days "`the sun will be darkened, and the moon will not give its light; the stars will fall from the sky, and the heavenly bodies will be shaken.' "At that time the sign of the Son of Man will appear in the sky, and all the nations of the earth will mourn. They will see the Son of Man coming on the clouds of the sky, with power and great glory. And he will send his angels with a loud trumpet call, and they will gather his elect from the four winds, from one end of the heavens to the other.
Acts 1:9-11: After he said this, he was taken up before their very eyes, and a cloud hid him from their sight. They were looking intently up into the sky as he was going, when suddenly two men dressed in white stood beside them. "Men of Galilee," they said, "why do you stand here looking into the sky? This same Jesus, who has been taken from you into heaven, will come back in the same way you have seen him go into heaven."
Revelation 1:7 Look, he is coming with the clouds, and every eye will see him, even those who pierced him; and all the peoples of the earth will mourn because of him. So shall it be! Amen.
I am aware of all the sophistry used by the Watchtower in its attempt to demonstrate that the Bible does not mean what it says (as is so often the case with the Watchtower). However, the Bible is the Word of God, and I believe that it does mean what it says. Jesus' return will be a visible event.
Tom
"The truth was obscure, too profound and too pure; to live it you had to explode." ---Bob Dylan