Your life is nothing but a unique story of experiences of many seconds bundled and weaved together.
The key term is "seconds".
You may live for years and months but in reality, you live through many seconds for years and months.
You live your life across many seconds.
In fact, you live in seconds.
You came into existence at a certain specific second in eternity.
And finally, you will disappear into nothingness at another certain specific second in eternity.
Your life is the length of duration between the above two specific seconds.
That is why you should live one second at a time.
1, 2, 3, gone.
No.
Once again.
1, 2, 3, gone.
Still there.
Then once again.
1, 2, 3, gone.
And like that.
On and on.
Till you drop dead.
Living life one second at a time is the best way to live.
You should try your best to live in such a way that you live for as many seconds as you can but must always be ready and prepared to leave any second.
You should feel happy and blessed as you live through one second and must view the next second as your last one.
For a certain next second, you will absolutely be right!
And that next second will be your last second.