114 In modern times, mention should be made of the important contribution of Saint Francis de Sales. Francis frequently contemplated Christ’s open heart, which invites us to dwell therein, in a personal relationship of love that sheds light on the mysteries of his life. In his writings, the saintly Doctor of the Church opposes a rigorous morality and a legalistic piety by presenting the heart of Jesus as a summons to complete trust in the mysterious working of his grace. We see this expressed in his letter to Saint Jane Francis de Chantal: “I am certain that we will remain no longer in ourselves… but dwell forever in the Lord’s wounded side, for apart from him not only can we do nothing, but even if we were able, we would lack the desire to do anything”.
Source: Dilexit Nos (Vatican.va)