Rendu was attentive to assuring that her companions had time for prayer, but sometimes there was a need to "leave God for God" as Vincent de Paul taught his Daughters. Once, while accompanying a Sister on a charitable visit, she said to her: "Sister, let's begin our meditation!" She suggested the plan, the outline, in a few simple, clear words and entered into prayer. Like a monk in the cloister, Rendu walked everywhere with her God. She would speak to God of this family in distress as the father no longer had any work, of this elderly person who risked dying alone in an attic: "Never have I prayed so well as in the streets," she would say.