I think the meditation for each decade is based on the virtues…
The Joyful Mysteries
The messenger of God announces to Mary that she is to be the Mother of God
(Humility)
Mary visits and helps her cousin Elizabeth.
(Love of Neighbor)
Mary gives birth to Jesus in a stable in Bethlehem.
(Spirit of Poverty)
Jesus I presented in the Temple.
(Obedience to God’s Will)
Jesus is found in the Temple.
(Fidelity to Vocation)
The Sorrowful Mysteries
Jesus undergoes his agony in the Garden of Gethsemane.
(Spirit of Prayer)
Jesus is scourged at the pillar.
(Modesty and Purity)
Jesus is crowned with thorns.
(Courage)
Jesus carries the cross to Calvary.
(Patience in Suffering)
Jesus dies on the cross for our sins.
(Self-denial)
The Glorious Mysteries
Jesus rises from the dead.
(Faith)
Jesus ascends into heaven.
(Hope)
The Holy Spirit comes to the apostles and the Blessed Mother.
(Wisdom, Love, Zeal, Fortitude)
The Mother of Jesus is taken into heaven.
(Eternal Happiness)
Mary is crowned queen of heaven and earth.
(Devotion to Mary and Final Perseverance)