In mental dimension The conscious mind is, at least, a fourth dimensional entity. It is similar to or the same as time and viewpoint. Without mind, there is no experience of time. And without a viewpoint, there is no mind. If we could not view the sequence of experiences that make up our lives, then there would be no memory for the previous scenes of our life. To be aware of the scenes we require an additional dimension. Hence conscious mind is at least a fourth dimensional entity. In present time we view 3 dimensions. In remembering we view the past as a sequence of 2 dimensional pictures or one past incident as a three dimensional incident. If we observe a past (or imaginary incident) in 3 dimensions, then we loose, temporarily, our experience of time and space in the present. Hence the mind is a four dimensional entity, and it is, at least sometimes, limited to four dimensions. That is, it does not perceive in five dimensions. When calls are made for all dimensions, then other calls cannot be handled. When we are emotionally involved in a past incident, we are not aware of the present, or the passage of time. We are aware only of that past incident. Therefore, we can scan the time track as a sequence of pictures (2 dimensional images) or enter a memory bubble and perceive it in 3 dimensions. But we cannot do both. We can scan higher dimensions by sampling them in 4 dimensions. We can flit from one 3 dimensional experience to another. Or even move to and fro between them.
We can imagine a 2 dimensional circle and a 2 dimensional square in the same place, but we cannot imagine a sphere and a cube in the same place! No two objects can occupy the same space in 4 dimensions!