Saint Teresa of Avila was a Spanish nun, one of the great mystics and author of spiritual classics. Here are her sayings on Humbleness.

Passage

Do not think you have made any progress in perfection until
you regard yourself as the last of all, and desire that all others should
be preferred to you, because it belongs to those who are great in
the eyes of God to be little in their own.

One day during which we humble ourselves profoundly on account
of our sins and miseries brings to us more graces than many days
employed in prayer.

He who is truly humble can never persuade himself that any one
can do him wrong. What a thought!—that He Who is our Creator
bears with so many injuries from His creatures, and we are wounded
by a word! It matters little if we are esteemed or not, whether good
or evil is said of us. Honors should be to us a greater affliction than
injuries or insult.

Abbe Lasausse translated by James O’Brien. Short Meditations for Every Day of the Year. Benziger Brothers, 1890.