This "virtual choir" of Discalced Carmelite nuns from around the world singing in honor of the 500th anniversary of the birth of St. Teresa of Avila evokes most beautifully the desire of St. Therese "to preach the gospel on all five continents simultaneously."  They are chanting a poem often called "St. Teresa's bookmark," also known as "The Efficacy of Patience."  The text in Spanish:

"Eficacia de la Paciencia"

Nada te turbe, 
nada te espante, 
todo se pasa, 
Dios no se muda;
la paciencia 
todo lo alcanza; 
quien a Dios tiene 
nada le falta:
Sólo Dios basta.

English translation:

"Efficacy of Patience."

Let nothing trouble you,
Let nothing scare you,
All is fleeting,
God alone is unchanging.
Patience
Everything obtains.
Who possesses God
Nothing wants.
God alone suffices.

[from The Collected Works of St. Teresa of Avila, Volume Three: translated by Kieran Kavanaugh, O.C.D. and Otiliio Rodriguez, O.C.D.  Washington, D.C.: Washington Province of Discalced Carmelites, Inc., 1985]. 

St. Teresa of Avila

Since St. Therese was named for St. Teresa of Avila (Therese being merely the French form of the name "Teresa"), during her lifetime Therese celebrated her feast on October 15, the feast of St. Teresa.  In honor of the feast I recommend the article "Therese of Lisieux and the Discalced Carmelite Tradition," by Sister Margaret Dorgan, D.C.M., in which Therese's relationship with Teresa of Avila and with John of the Cross is explored.  This article appeared in the Summer 1997 issue of The Way Supplement , (pp 28-37). Copyright The Way, Heythrop College, Kensington Square, London, W8 5HQ, England.  I thank the editors of The Way, a British journal of contemporary spirituality, for granting me permission to allow you to read it.

Dr. Keith Egan, theologian and author, will speak on “Therese of Lisieux, Gifted Daughter of Saint Teresa of Avila" on Sunday, September 29, 2013 at 2:00 p.m.  Keith will explore what wisdom Saint Therese learned from Teresa and the wisdom that Teresa has for us.  For details, please visit Carmelstream.  You may also read "Carmelite nuns plan 3-year celebration of 500th birth anniversary of founder" in the Providence Journal.  The lecture is free and open to the public.