[RightWhale]

otherwise everything would happen at once

It does.

[Bear_Slayer]

Everything that is happening right now and now and now is happening at once, but everything that has ever happened and will ever happen can not happen at once.

This process we call time and it is measured by the rotation of the earth and its revolution around the sun.

Time isn't a perception. It really exists.

[boojumsnark]

Time is just one darn thing after another.

See my tagline