Value of time

Have you ever calculated the exact value of time?

What is the meaning of '1 second'?

What is stated in international standard? "the duration needed by caesium-133 atom to responds certain times of radiation at certain level of states"? Is it really reflecting the exact value of time??? No, that just a standard to measure time, a model some scientists universally agreed on to simplified the complexity of the universe.

I thought about it for a second and remember my high school physics teacher once said, "time is a metric that doesn't have negative value". Once it's gone, it's gone. He said that to teach us that there's no such thing as 'second chance', you just have once shot of everything. What we call today as 'second chance' is actually different attempt on different point of time, it's a repetition of experience not the event . There's no turning back from what you've done, not even in a milisecond. Even in quantum physics we learn that it's possible to time travel to the future, not to the past. And maybe that is the exact value of time right? Time is the sum of every single unique event that you will never repeat. Something to be thought of, be evaluated, be regretted, to be happy about, but won't be repeated.

Just a thought.

picture taken from here with the help of Google image search.