“Let’s not forget that the little emotions are the great captains of our lives and we obey them without realizing it.”

Letter to Sisters at Saint Mary's, 1848.
Context: Let us never forget that if we wish to die like the Saints we must live like them. Let us force ourselves to imitate their virtues, in particular humility and charity.

"A Flower of a Day"
Poems (1866)

"Proclamation 3560 — Thanksgiving Day, 1963" (5 November 1963) http://www.presidency.ucsb.edu/ws/?pid=9511<!-- Online by Gerhard Peters and John T. Woolley, The American Presidency Project -->
1963
Context: Today we give our thanks, most of all, for the ideals of honor and faith we inherit from our forefathers —  for the decency of purpose, steadfastness of resolve and strength of will, for the courage and the humility, which they possessed and which we must seek every day to emulate. As we express our gratitude, we must never forget that the highest appreciation is not to utter words but to live by them.
Let us therefore proclaim our gratitude to Providence for manifold blessings — let us be humbly thankful for inherited ideals — and let us resolve to share those blessings and those ideals with our fellow human beings throughout the world.

Letter to Sisters at Saint Mary's, 1848.

Source: You Learn by Living: Eleven Keys for a More Fulfilling Life

First Mansions, Ch. 2 : The Human Soul, as translated by the Benedictines of Stanbrook (1911), revised and edited by Fr. Benedict Zimmerman
Interior Castle (1577)
Context: We shall never learn to know ourselves except by endeavoring to know God; for, beholding His greatness we realize our own littleness; His purity shows us our foulness; and by meditating upon His humility we find how very far we are from being humble.

1960s, Keep Moving From This Mountain (1965)
Context: Each of us lives in two realms, the "within" and the "without." The within of our lives is somehow found in the realm of ends, the without in the realm of means. The within of our [lives], the bottom — that realm of spiritual ends expressed in art, literature, morals, and religion for which at best we live. The without of our lives is that realm of instrumentalities, techniques, mechanisms by which we live. Now the great temptation of life and the great tragedy of life is that so often we allow the without of our lives to absorb the within of our lives. The great tragedy of life is that too often we allow the means by which we live to outdistance the ends for which we live.