To know yourself is to forget yourself.

And we forget because we must

Forgetting oneself is opening oneself

One of the tragedies of our life is that we keep forgetting who we are

In looking out upon the world, we forget that the world is looking at itself.

We forget what we already have, don

Our eyes are on the past, and our imaginations fly to the future. This makes us impervious to the present moment. So we forget to be kind. We forget to say hello to a stranger or listen to a friend. We forget to be good to ourselves.

And we forget because we must and not because we will.

you are undone if you once forget that the fruits of the earth belong to us al, and that the earth itself belongs to nobody

...as far as we are capable of knowledge we sin in neglecting to acquire it...

Forgetting our objectives. — During the journey we commonly forget its goal. Almost every profession is chosen and commenced as a means to an end but continued as an end in itself. Forgetting our objectives is the most frequent of all acts of stupidity. FRIEDRICH NIETZSCHE, 1844

And we forget because we must
And not because we will

Matthew Arnold, ‘Absence’ (1852)

We forget all too soon the things we thought we could never forget. We forget the loves and the betrayals alike, forget what we whispered and what we screamed, forget who we were.

Well... ...That's what you always forget, isn't it? I mean, you forget to pay attention to what's happening. And that's the same as not being here and now.