This is a parable from One Minute Wisdom, by Fr. Anthony de Mello, S.J.
It intrigued the disciples that the Master who had lived so simply would not condemn his wealthy followers.
"It is rare but not impossible for someone to be rich and holy," he said one day.
"When the money has the effect on his heart that the shadow of that bamboo has on the courtyard."
The disciples turned to watch the bamboo's shadow sweep the courtyard without stirring a single particle of dust. (83)