June is the month of the Sacred Heart of Jesus. This is the first -- and best -- image of the Sacred Heart. It was painted in 1740 by Pompeo Batoni, and resides in the Church of the Gesu in Rome, mother church of the Jesuits. (Thanks to Supertradmum for the tip on the provenance of this picture.)
The key to devotion to the Sacred Heart is making reparation for all the outrages by which Our Lord is offended. It seems scarcely possible that there was ever a time in the history of the world since the Crucifixion when He had more cause to be offended than right now.