“Time isn’t precious at all, because it is an illusion. What you perceive as precious is not time but the one point that is out of time: the Now. That is precious indeed. The more you are focused on time—past and future—the more you miss the Now, the most precious thing there is.” 
― Eckhart Tolle, The Power of Now: A Guide to Spiritual Enlightenment

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“I sit beside the fire and think 
Of all that I have seen
Of meadow flowers and butterflies
In summers that have been

Of yellow leaves and gossamer
In autumns that there were
With morning mist and silver sun
And wind upon my hair

I sit beside the fire and think
Of how the world will be
When winter comes without a spring 
That I shall ever see

For still there are so many things
That I have never seen
In every wood in every spring
There is a different green

I sit beside the fire and think
Of people long ago
And people that will see a world
That I shall never know

But all the while I sit and think
Of times there were before
I listen for returning feet 
And voices at the door”

― J.R.R. Tolkien