Our emphasis up to this point has been Heavens warnings about violations of the Second and Third Commandments, which are the sins of blasphemy and the profanation of Sundays. Yet Our Lord, in the above quotation is complaining of more. He mentions specifically “violations of the first three Commandments, which include the First Commandment:

“ I am the Lord thy God, though shalt not have strange gods before Me. “

What then constitutes a sin against the First Commandment? The answer is found in the Catechism of the Council of Trent, the Catechism of Pope Saint Pus X, and the Baltimore Catechism:

In summary, the First Commandment forbids idolatry, superstition, spiritism, tempting God, sacrilege, and sins against Faith.

From the book: The Revelations of the Holy Face of Jesus by John Vennari