moving at c along the 4th dimension. But light has all of its motion through 3D space being stationary in the 4th dimension, why is the light not left behind as the rest of the matter passes on along the 4th dimension? Why can we still detect light that appears to have been travelling across space for light years? If matter moved along the 4th dimension at c but light didn't then the light would not be visible. It must also be travelling along the 4th dimension at c to keep pace.In my opinion it is travelling afore-ward along the 4th dimension and across 3D space. (As these dimensions are perpendicular it can be thought of as two waves one the "magnetic" part travelling along 4th dimension the "electro" part travelling through 3D vector space.) Small variations in change of position along the 4th dimension due to changes in position within vector space of matter will not be significant in comparison to the continuous afore ward motion of all matter. It is only when extreme velocities close to light speed are reached that this may have a noticeable effect. Movement along the 4th dimension is loss of potential energy. Movement along this dimension gives rise to the subjective experience of time. Potential energy is mass x height x g. To consider universal change in potential energy the terms of this formula need consideration. g = Mega universal attraction constant,Qc, which is the force that draws all mass and electromagnetic radiation