I found that quote in a book I recently read called "People of the Lie: The Hope to Healing Human Evil".
I read a bit about St. Therese and was really touched by her story - made me cry even: "Some dismiss her as a saccharine neurotic, but anyone who tries to practice her spirituality of sacrificial love quickly realizes how hard it is, how strong she was, and how transforming her personal nonviolence can be for all of us.
Therese.. dedicated herself to the daily practice of sacrificial love toward those around her, perfecting the art of responding to coldness, rudeness, gossip, and insults with active loving kindness and inner compassion. She aimed these small acts of unconditional love at Christ in the other person and for the redemption of the human race--a spirituality she called her "little way." She wanted to remain like a child, as Jesus instructed when he said that we must become like children if we want to enter the reign of God. She understood this spirituality not as childishness, but as a profound trust in God through confidence in God's love, not just despite our littleness, poverty, weakness and brokenness, but precisely because of them."
I think she's a good example for practitioners of Falun Dafa as well.