Q. Do you know what the “sign of the Son of Man” is? Some say the cross, some tell me it’s the fish sign. Jesus said it like we should all know what it is.
A. Lots of people have opinions about this and the two you mentioned are the favorites. But the fact is that the Bible does not clarify this for us.
Here’s what we know. In Matt. 24:3 the 4 disciples asked Jesus, “What will be the sign of your coming and of the end of the age?”
In Matt. 24:27 Jesus said His coming would be as visible as lightning that comes from the East is visible in the west. In Matt 24:29 He said the sky will go completely dark. Neither the Sun nor the Moon will give any light and the stars will fall from the sky. Then in Matt. 24:30 He said 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.
In Rev. 19:11 John described this event as heaven standing open to reveal a rider on a white horse followed by the armies of heaven all on white horses and dressed in white. Put it all together and it’s possible to conclude that this is the sign of the Son of Man. Think about it. A completely dark sky will suddenly be filled with a celestial army led by a rider identified as “King of Kings and Lord of Lords”. That’s some sign.