That there is no dimension of time. The past is consumed the present, to inform and drive it. Causality and conservation of energy. Cause becomes effect.

Time is frequency, events are amplitude.

It's just that as mobile organisms, our sentient interface between body and world operates as a sequence of perceptions, in order to navigate, so we experience time as the point of the present moving past to future, but the reality is change turning future to past.

Energy is conserved, because it is the present, creating time, as well as temperature, pressure, color and sound. So energy goes past to future, while the patterns it generates go future to past. Energy drives the wave, the fluctuations rise and fall.

So energy radiates out, as structure coalesces in. energy lost from one area is replaced by energy radiating in from surrounding areas.

Gravity curves the measure of space in, as radiation curves it out, so the space between galaxies expands in inverse proportion to the rate it curves into them.

Balance.