Grasping to the experience of infinite space,
grasping to the clarity of infinite consciousness,
grasping to the state in which experiences dissolve into nothingness,
grasping to the state of non-conceptuality.
These are the four errors of meditation as they occur in worldly meditative absorptions.
They are worldly because they still rely on mind and subtle craving that occurs within the domain of mind. They are errors because you are still bound by grasping and fixation and thus the root of selfishness is not cut.