This provides the explanation of this by the Catholic Talk Show’s Ryan Scheel, as reported in an article in ChurchPoP:
“This means that you have the absolute subordination to the soul. The body and the soul are definitely united, because that is what a human is. But the soul is so subordinate to the body that it could pass through walls–like Jesus did in the upper room on Pentecost,” explains Scheel.
“The body is guided by the soul in a way that is not now.”
Scheel continues, “Jesus was able to ascend to heaven…[St. Thomas] Aquinas said that human beings will be able to travel in their resurrected bodies at will–in the wink of an eye. If they want to be there, they are there.”
“This means you can’t get sick and you won’t have any imperfections in your body,” Scheel explains. “With impassability, you couldn’t even stub your toe if you tried,” Scheel adds.
“Our Lord gave a prefigurement of this in the Transfiguration. Also, on the walk to Emmaus where they didn’t even recognize Jesus until they did the breaking of the bread. Our bodies will be transfigured in a glorified way,” Scheel said.
“When people see light, or they see ‘transfigured Lord’–it’s light. The human mind physically cannot understand that glory and can only see it as light.
“In a transfigured body, you will have the deeper understanding of what that light looks like or means. But to us now, it’s just light,” Scheel concludes."