You know the past only in the present and as part of the present.

The past is a ghost, the future is a dream, and all we ever have is now.

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.

There's no present. There's only the immediate future and the recent past.

The past exists only in our memories, the future only in our plans. The present is our only reality. The tree that you are aware of intellectually, because of that small time lag, is always in the past and therefore is always unreal. Any intellectually conceived object is always in the past and therefore unreal. Reality is always the moment of vision before the intellectualization takes place. There is no other reality.

Past events exist, after all, only in memory, which is a form of imagination. The event is real now, but once it’s then, its continuing reality is entirely up to us, dependent on our energy and honesty.

There are those of us who learn to live completely in the moment. For such people the Past vanishes and the future loses meaning. There is only the Present, which means that two of the three Aalim are surplus to requirements. And then there are those of us who are trapped in yesterdays, in the memory of a lost love, or a childhood home, or a dreadful crime. And some people live only for a better tomorrow; for them the past ceases to exist

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.

Vive el presente, recuerda el pasado y no temas el futuro, porque no existe, ni existirá jamás. Sólo existe el ahora.

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

Our past is but a former now, our future a potential one.

There exists only the present instant... a Now which always and without end is itself new. There is no yesterday nor any tomorrow, but only Now, as it was a thousand years ago and as it will be a thousand years hence.

I looked anxiously around me: the present, nothing but the present. Furniture light and solid, rooted in its present, a table, a bed, a closet with a mirror-and me. the true nature of the present revealed itself: it was what exists, and all that was not present did not exist. The past did not exist. Not at all. Not in things, not even in my thoughts. It is true that I had realized a long time ago that mine had escaped me. But until then I had believed that it had simply gone out of my range. For me the past was only a pensioning off: it was another way of existing, a state of vacation and inaction; each event, when it had played its part, put itself politely into a box and became an honorary event: we have so much difficulty imagining nothingness. Now I knew: things are entirely what they appear to be-and behind them... there is nothing.

Thus, to see all memory as present experience is to collapse the boundaries of this present moment, to free it of illusory limits, to deliver it from the opposites of past vs. future. It becomes obvious that there is nothing behind you in time nor before you in time. You thus have nowhere to stand but in the timeless present, and thus nowhere to stand but in eternity.