Calasanz gave a valuable insight into his own personality when he wrote.

"The easiest and the shortest road or way to heaven is to know the attributes of mercy, prudence, infinite patience, and the goodness of God. One must humble oneself to the level of the children, especially to the level of those who are the most abandoned of all. Since this is a base job and vile to the eyes of the world, few are those who want to go down to that level. But God uses us to give back a hundredfold."