It means do not dwell on the past as if you could have changed something to make it work.
Scanners Live in Vain was created in 1950-01.
i have made mistakes in my lide, but i know now what i could of have done differently so why live dwelling over it.
To do something in vain means that you do not succeed in doing what you are trying to do; to try in vain is to fail.
in vain means the expected result is not going to happen
I think you mean "vain".
for no point
Vain means conceited, or it may mean to no avail. Here are some sentences.She tried in vain to stand on her head.He was as vain as a peacock."You're so vain!" (a song by Carly Simon)
To die in vain means that you died for a cause but your death did not change anything.
Without effect or to no purpose
That you lived and died for no purpose.