14 Who does not see, venerable brethren, that opinions of this kind are in entire disagreement with the teachings which Our predecessors officially proclaimed from this seat of truth when approving the devotion to the Sacred Heart of Jesus.? Who would be so bold as to call that devotion useless and inappropriate to our age which Our predecessor of immortal memory, Leo XIII, declared to be "the most acceptable form of piety?" He had no doubt that in it there was a powerful remedy for the healing of those very evils which today also, and beyond question in a wider and more serious way, bring distress and disquiet to individuals and to the whole human race. "This devotion," he said, "which We recommend to all, will be profitable to all." And he added this counsel and encouragement with reference to the devotion to the Sacred Heart of Jesus: ". . .hence those forces of evil which have now for so long a time been taking root and which so fiercely compel us to seek help from Him by Whose strength alone they can be driven away. Who can He be but Jesus Christ, the only begotten Son of God? 'For there is no other name under heaven given to men whereby we must be saved.'(8) We must have recourse to Him Who is the Way, the Truth, and the Life."(9)
Source: Haurietis Aquas (Vatican.va)