Two or more events which occur at the same time are simultaneous.
Events which are simultaneous occur at nearly the same time, but do not necessarily
begin or end at the same time or have equal time values.
Although the consequences of changing events may be observed over time, such as the gradual buildup of a mountain chain or the lifecycle of a star, the combined action of all events occurring in the universe at any given moment is nearly instantaneous.
All events occur simultaneously in the present.
The instantaneous moment of time in which all events occur is equal to the minimum length of time required to cause a change.*
The average time rate at which all events occur is equal to the sum of the rates divided by the number of events.
The instantaneous moment of time in which all events occur, and the average rate of the events are constant.
* (In quantum physics, the minimum amount of time which is meaningful is equal to the unit of time known as the Plank time, or 10-43 sec. The Plank time is calculated by combining the fundamental constants of gravity, the average speed of light, and Plank’s constant. The Plank time is given by the square root of Gh/c5.)
Words move, music moves
Only in time; but that which is only living
Can only die. Words, after speech, reach
Into the silence. Only by the form, the pattern,
Can words or music reach
The stillness, as a Chinese jar still
Moves perpetually in its stillness.
Not the stillness of the violin, while the note lasts,
Not that only, but the co‑existence,
Or say that the end precedes the beginning,
And the end and the beginning were always there
Before the beginning and after the end.
And all is always now.
T. S. Eliot