There is a great poem by T.S. Eliot, titled "Ash Wednesday." It's a long and complicated poem, but it's one of my favorites, and I always turn to it on this day. It is too long to quote in its entirety but I will quote what I think is the most beautiful part, Part II.
By the sweat of your brow you shall eat bread,
Until you return to the ground, from which you were taken;
For you are dust, and to dust you shall return.
Lady, three white leopards sat under a juniper-tree
In the cool of the day, having fed to satiety
On my legs my heart my liver and that which had been contained
In the hollow round of my skull. And God said
Shall these bones live? shall these
Bones live? And that which had been contained
In the bones (which were already dry) said chirping:
Because of the goodness of this Lady
And because of her loveliness, and because
She honours the Virgin in meditation,
We shine with brightness. And I who am here dissembled
Proffer my deeds to oblivion, and my love
To the posterity of the desert and the fruit of the gourd.
It is this which recovers
My guts the strings of my eyes and the indigestible portions
Which the leopards reject. The Lady is withdrawn
In a white gown, to contemplation, in a white gown.
Let the whiteness of bones atone to forgetfulness.
There is no life in them. As I am forgotten
And would be forgotten, so I would forget
Thus devoted, concentrated in purpose. And God said
Prophesy to the wind, to the wind only for only
The wind will listen. And the bones sang chirping
With the burden of the grasshopper, saying
Lady of silences
Calm and distressed
Torn and most whole
Rose of memory
Rose of forgetfulness
Exhausted and life-giving
The single Rose
Is now the Garden
Where all loves end
Of love unsatisfied
The greater torment
Of love satisfied
End of the endless
Journey to no end
Conclusion of all that
Speech without word and
Word of no speech
Grace to the Mother
For the Garden
Where all love ends.
Under a juniper-tree the bones sang, scattered and shining
We are glad to be scattered, we did little good to each other,
Under a tree in the cool of day, with the blessing of sand,
Forgetting themselves and each other, united
In the quiet of the desert. This is the land which ye
Shall divide by lot. And neither division nor unity
Matters. This is the land. We have our inheritance.
Read the entire poem here. You may not get it all, and trust me, I don't get it all either. But it's worth reading.