131 Later, his spiritual director, Father Henri Huvelin, helped Charles to deepen his understanding of the inestimable mystery of “this blessed heart of which you spoke to me so often”. On 6 June 1889, Charles consecrated himself to the Sacred Heart, in which he found a love without limits. He told Christ, “You have bestowed on me so many benefits, that it would appear ingratitude towards your heart not to believe that it is disposed to bestow on me every good, however great, and that your love and your generosity are boundless”. He was to become a hermit “under the name of the heart of Jesus”.
Source: Dilexit Nos (Vatican.va)