"…Consequently, devotion to the Sacred Heart may be defined as devotion to the adorable Heart of
Jesus Christ in so far as this Heart represents and recalls His love; or, what amounts to the same thing, devotion to the love of
Jesus Christ in so far as this love is recalled and symbolically represented to us by His Heart of flesh.
Hence the devotion is based entirely upon the symbolism of the heart. It is this symbolism that imparts to its meaning and its unity, and this symbolism is admirably completed by the representation of the Heart as wounded. Since the Heart of
Jesus appears to us as the sensible sign of His love, the visible wound in the Heart will naturally recall the invisible wound of this love. This symbolism also explains that the devotion, although giving the Heart an essential place, is but little concerned with the anatomy of the heart or with physiology."