121 And so, following in the footsteps of Our immediate predecessor, We are pleased to address once again to all Our dear sons in Christ those words of exhortation which Leo XIII, of immortal memory, towards the close of last century addressed to all the faithful and to all who were genuinely anxious about their own salvation and that of civil society: "Behold, today, another true sign of God's favor is presented to our gaze, namely, the Sacred Heart of Jesus. . .shining forth with a wondrous splendor from amidst flames. In it must all our hopes be placed; from it salvation is to be sought and hoped for."(121)
Source: Haurietis Aquas (Vatican.va)