Present.
"Present" is a fleeting and vague concept at best.
The moment between the past and the future?
That doesn't really mean anything.
Thinking too much about things that don't make sense is a waste of time.
That's why living through the present is always the best option.
Besides, for us who can't foresee the future and who forget the past too easily, present is really the only proof of our existence.
Even though existence will go on even if you forget about it for a while, it's good to seize the day at least every once in a while.
That way... You can confirm that you are, in fact...
Alive.

Before is the past, ahead is the future. But right now, is a gift. That's why its called the present.