Keeping our missionary fervor alive calls for firm trust in the Holy Spirit, for it is he who “helps us in our weakness.” But this generous trust has to be nourished, and so we need to invoke the Holy Spirit constantly. He can heal whatever causes us to flag in the missionary endeavor. It is true that this trust in the unseen can cause us to feel disoriented: it is like being plunged into the deep and not knowing what we will find. I myself have frequently experienced this.
Yet there is no greater freedom than that of allowing oneself to be guided by the Holy Spirit, renouncing the attempt to plan and control everything to the last detail, and instead letting him enlighten, guide and direct us, leading us wherever he wills. The Holy Spirit knows well what is needed in every time and place. This is what it means to be mysteriously fruitful!