Eternity

Eternity is defined as timelessness, a state to which time has no application, a "situation" where time does not exist anymore, and upon which we have no control whatsoever. Time moves on inexorably, either you are happy (and wish it never passes) or you are sad (and wish it would go on quickly). Time flows like the water of a river, on and on and on... But, while in the distant future the river will stop flowing, time will never come to a halt. Even when all things exist no more, time will keep going on and on and on... Wait a minute: Einstein said that time and space must coexist, meaning that when matter is "created", time comes along with it. Without matter, time does not exist. Here is the good news, though: after the end of our Universe, we can wait for a new Big Bang, and then we shall be able to start counting seconds, minutes and hours once again!