Harmony, according to Merriam-Webster, is defined as correspondence, accord.
Matthew 22:37 Jesus said to him: Thou shalt love the Lord thy God with thy whole heart, and with thy whole soul, and with thy whole mind.
Are you claiming that the Immaculate Conception was not the perfect exemplar of the Lord's Word? What Bible are you reading?
What in His Holiness' homily, do you think, contradicts the fact the Our Lady loved God with all her mind?