a split of a second

Do you believe in how a split of a second could shift the entire trajectory of your life? Or let me put it in this way, have you ever been in a situation where in just a split of a second:

you received a rejection email for a job that you've been eagerly waiting for

or how

you missed that train ride to work in just a matter of a second

The truth is I have come to a realization that we are all living in a world where we are constantly on this chasing cycle of what's next till we tend to forget that all we have now is now. Every second counts right?