What makes St Thérèse so special?
We have grown used to the idea that just as there are people with talents for sport or scholarship, and the rest of us can only admire them without trying to keep up, so there are people with a talent for holiness and heroic virtue, and the rest of us can only bumble along as best we can. We can’t do better because we’re not designed to do better, so there’s no point in trying. We sink into a consoling mediocrity.
Thérèse wrecks this. She was physically weak and psychologically vulnerable. For her the great saints were giants, they were inaccessible mountains, and she was only an “obscure grain of sand;” but she was not discouraged. St John of the Cross taught her that God can never inspire desires that cannot be fulfilled. The Book of Proverbs told her, “If anyone is a very little one, let him come to me.” If you only look, Scripture is permeated with images of our littleness and weakness with respect to God, and of his care for us in our insignificance.
From Universalis, Liturgy of the Hours