These are the insignia that must be on our coat of arms, for we must desire to observe poverty in every way: in houses, clothing, words, and most of all in thought. As long as you do this, have no fear that the religious life in this house will fail; God will help.
As St. Clare said, great walls are those of poverty. She said that it was with walls like these, and those of humility, that she wanted to enclose her monasteries.
Surely, if poverty is truly observed, recollection and all the other virtues will be much better fortified than with very sumptuous buildings. Be careful of buildings like these; I beg you for the love of God and by His precious blood. And if I can say this in good conscience, may such a building fall to the ground the day you construct one.
Saint Teresa of Avila
The Way of Perfection, Chap. 2, no. 8
Teresa of Avila, St. 1985, The Collected Works of St. Teresa of Avila, translated from the Spanish by Kavanaugh, K; Rodriguez, O, ICS Publications, Washington DC.