The next section of the guide to Control contains a description of how to deal with the monster absorbing matter in Parapsychology. You encounter this creature during Old boy's club main mission.
The beast is locked in a separate room, but you will have to open the passage to it to continue the main mission. The monster can't be killed - objects thrown at it with telekinesis will only stop the creature for a moment. You have to handle it differently.
Start by opening the passage on the right. Go through it and keep moving until you reach the place with the monster. Lift the box and drop it into the recess. Then, use telekinesis to lift the second battery and also place it in the next hole. Of course, you should keep an eye on the creature - it will slowly move towards you. If you have to, move away from it a bit and use the fact that telekinesis has a great range.
Go into the recently opened tunnel. Then, open the door, look at the approaching creature and... wait. Let the creature approach you, then go through the nearby door and quickly run to the control panel. You have to be fast - you don't want to let the monster get out of the tunnel. Press the button - the monster will get trapped. You are now able to continue the plot.