harbin

    Two dimensions subjects, forms, are stricly talking restricted to their plan and two dimensions if they are not to move or change in any manner during a laps of time.
    Time is another dimension to be added and we should consider that a living form is engaged in this dimension. So a triangle or a square are existing in a two dimensions plan and enable to see only one dimension, the one of the plan they live in. Question is: in two dimensions, are reflections, light or sound possible if we are not considering time? No they're aren't. So two dimensions forms just can express themselves further than their own line of constitution. A square that would emit some sound or light would be breaking the rule of the two dimensions or, using some abilities to some superior dimensions without being aware of it. It would consider it's projecting something in the plan. And in return would be able to sense the other forms engaged in the same plan.
    Laborantines in their white dresses, would tell you, the best is always to come, when we add the intruder.
    So, once again, imagine a three dimensions object, evolving about a two dimensions plan. Light and sound can be emitted and reflected on its surface before they come to the contact of the two dimensions plan. Imagine a metallic sphere reflecting the light, approching a sheet in which are included forms. Before it gets in contact and even before it crosses the plan, its light and its presence is visible, it can be sensed. A foresign tells about its imminent irruption or presence.  And, more attractive, the two dimension plan reflecting on its surface seems like a folding area of curved space.
    Square and triangles can guess the presence of a sphere without noticing it,  really, only by the warmth or the cold of it.
    Now , in our world which is made of three dimensions where we are engaged in four dimensions lives, as commonly repeated, we might encounter some reflects, some lights or sounds which sources are not clearly established.
   If a fifth dimension object is about to enter our four dimensions, it might reflect or emit something that would be visible in our three dimensions world.  Considering  you'll always see one dimension lower than the number of dimension you're involved in  (the n-1 mathematicians love so much) superior dimensions being would only be revealed to you from the moment they decide it, or from the moment you read the foresigns of their actions.
  What is a fifth dimension being, a being which has the possibility to see and move to any place to any time its lower dimensions are connected to. From its origins to its end, that are not that distinguished in the fifth dimensions, since the world of fith is not linear but somehow origami like, a sheet of paper is always a sheet but its points might be connected since it's folded in a manner or another. And in the same time the form it  has is not its real form but the one its considering at a given moment  we're are choosing independtly of it own choices. A fifth is a polymorph being. There might be some improbable connections of points that originally are distant like two poles can be, and speaking of ends or extremities are nonsenses. 
  What can a fifth dimension being do in our three-four dimension world ? Well, it might be tricky, because its presence is simultaneously interacting with the continuity of our existence. A fifth being is able to interact with some part of your being you think forgotten in your past or not happened yet in your future. Fifth have the ability to read past and future from any point at the moment they are connected to this point. Truth is theirs and matter as well.
Again, the important question of relation between mind and matter is to be ... Think about it.