Live in the present, remember the past, and fear not the future, for it doesn't exist and never shall. There is only now.

I don’t live in either my past or my future. I’m interested only in the present. If you can concentrate always on the present, you’ll be a happy man. Life will be a party for you, a grand festival, because life is the moment we’re living now.

It's being here now that's important. There's no past and there's no future. Time is a very misleading thing. All there is ever, is the now. We can gain experience from the past, but we can't relive it; and we can hope for the future, but we don't know if there is one.

With the past, I have nothing to do; nor with the future. I live now.

It is difficult to live in and enjoy the moment when you are thinking about the past or worrying about the future. You cannot change your past, but you can ruin the present by worrying about your future. Learn from the past, plan for the future. The more you live in and enjoy the present moment, the happier you will be.

For in truth neither past nor future have any existence apart from this Now; by themselves they are illusions. Life exists only at this very moment, and in this moment it is infinite and eternal. For the present moment is infinitely small; before we can measure it, it has gone, and yet it persists for ever.

Don’t think about the future. Just be here now.

There is no future, there is no past, I live this moment as my last

forget the past, for it is gone from your domain! forget the future, for it is beyond your reach! control the present! Live supremely well now! This is the way of the wise...

The past is already gone, the future is not yet here. There's only one moment for you to live, and that is the present moment

The past exists only in our memories, the future only in our plans. The present is our only reality.

Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment.

With the past, I have nothing to do; nor with the future. I live now. ~Ralph Waldo Emerson

The past?
That’s what we call our memories.
The future?
That’s what we call our imagination.
Neither exists outside of your mind.
The only real time is this moment.
So live accordingly.
Whatever benefits you right now is the right choice.