Before the Rosary, Divine Mercy, etc. ,
St Patrick converted many in Ireland to Christianity with only the Word of God. St Patrick lived his faith.
True, but you think if St Patrick had these graces he would have spurned them or rejected them harshly out of hand?
I'm sure King Louis XIV thought the same about the Sacred Heart... 100 years later and that cost France dearly, in fact they've never recovered from that. It was in fact taking such a chance with St Joan of Arc that saved France in the first place (they would never have taken such a chance on her like that without being in such a desperate and hopeless situation as they were in, and yet that was their vital path to salvation and changed everything)... Shouldn't the scriptures be enough? Why then the Chi-Rho with Constantine the Great? (whom given how you don't vote and the way you treat Trump knowing the alternative, you would have spurned those graces exactly the same way if you lived in those times) and yet, while he was far from perfect, not even being baptized yet... he was instrumental in ending the persecution of the early Christians and thus the spread of Christendom.
They thought the same about Our Lady of Fatima too... then WWII happened, bolshevism vs fascism and yet Portugal who resolved it with great difficulty but without fascism or bolshevism was totally ignored. Not only did WWII happen, but turns out Russia became one of the two world superpowers with Nuclear Weapons dividing the whole world between east and west. Sr Lucia also warned us about the battle over marriage and family and the conversion of Russia, USSR collapsed in 1992 and today it's not Russia attacking marriage and family, in fact they are defending those foundations.
God Bless