The olive is the Mediterranean tree par excellence; cultivated since ancient times in the Holy land; it is a symbol of prosperity and blessings of a peaceful life. From the " branch of olive " the dove brings to Noah a freshly plucked olive leaf which indicated the end of the downpour (Gen. 8:11), up to the "two olives” that in the apocalypse (11:4) represent the two witnesses of God who are entrusted "to prophesy" for the whole time of the persecution against the Church, the Bible often recalls the tree from the trunk and from the tormented branches of all the plants that could be the king. (Judges 9: 8). To point out His fruits of grace and glory, the Wisdom of God is compared to a beautiful olive tree growing in the fields (Sir. 24: 14) and the text is applied in the liturgy to the Mother of Jesus. And we cannot but remember with deep emotion the branches of olive waved by the crowd in Jerusalem to welcome Jesus the King of peace, the olive is a testimony of His prayers and His excruciating agony.
(cf Salvatore Garofalo, Prefazione “Come germoglio d’olivo”)