Thought it would interesting to share your own or favorites.  I have quite a collection.

Desiderata

"Go placidly amid the noise and the haste,
and remember what peace there may be in silence.

As far as possible, without surrender,
be on good terms with all persons.
Speak your truth quietly and clearly;
and listen to others,
even to the dull and the ignorant;
they too have their story.
Avoid loud and aggressive persons;
they are vexatious to the spirit.

If you compare yourself with others,
you may become vain or bitter,
for always there will be greater and lesser persons than yourself.
Enjoy your achievements as well as your plans.
Keep interested in your own career, however humble;
it is a real possession in the changing fortunes of time.

Exercise caution in your business affairs,
for the world is full of trickery.
But let this not blind you to what virtue there is;
many persons strive for high ideals,
and everywhere life is full of heroism.
Be yourself. Especially do not feign affection.
Neither be cynical about love,
for in the face of all aridity and disenchantment,
it is as perennial as the grass.

Take kindly the counsel of the years,
gracefully surrendering the things of youth.
Nurture strength of spirit to shield you in sudden misfortune.
But do not distress yourself with dark imaginings.
Many fears are born of fatigue and loneliness.

Beyond a wholesome discipline,
be gentle with yourself.
You are a child of the universe
no less than the trees and the stars;
you have a right to be here.
And whether or not it is clear to you,
no doubt the universe is unfolding as it should.

Therefore be at peace with God,
whatever you conceive Him to be.
And whatever your labors and aspirations,
in the noisy confusion of life,
keep peace in your soul.

With all its sham, drudgery, and broken dreams,
it is still a beautiful world.
Be cheerful. Strive to be happy."

Max Ehrmann

'The Moment'

"The moment when, after many years
of hard work and a long voyage
you stand in the centre of your room,
house, half-acre, square mile, island, country,
knowing at last how you got there,
and say, I own this,

is the same moment when the trees unloose
their soft arms from around you,
the birds take back their language,
the cliffs fissure and collapse,
the air moves back from you like a wave
and you can't breathe.

No, they whisper. You own nothing.
You were a visitor, time after time
climbing the hill, planting the flag, proclaiming.
We never belonged to you.
You never found us.
It was always the other way round."

Margaret Atwood