Interior "oratory"

The parents of Saint Catherine of Siena tried by every means they could to put obstacles in her way as regards prayer and meditation. Our Lord then inspired her to construct within her own heart a little interior "oratory" where she could mentally retire, even in the midst of exterior activity, and enjoy the solitude of her heart. Therefore, from that time on, she advised her spiritual sons and daughters to construct a small room in their own hearts and to dwell within it. (INT. Part II, Ch. 12; O. III, p. 93)

St Francis de Sales