Since this is the second time you have asked this question in 2 days, I will repost the best answer from yesterday:
Where in the Bible does it say that "everything" is in the Bible
Let me explain the Rosary.........
The rosary is a thinking prayer.
We look at the mysteries of the rosary and the scenes of our Lord's life.
The Hail Mary's are like background music, while we contemplate the mysteries. Rhythmic repetition soothes the mind. The rhythmic repetition of the fifty Hail Marys can soothe the mind and tranquilize it, so that we can think on the mysteries.
The truth is, repetition is the language of love. Repetition does not create monotony. It creates stability. Monotony is eliminated by attention, sincerity and purpose.
The most essential functions of life are repetitive, eating, sleeping, working and loving.
The rosary is the language of love.
Mary knows that there is nothing so able to straighten out our thinking and counteract the errors of modern society as daily meditation on the mysteries of the rosary
The Joyful Mysteries teach us that life and religion are meant to be joyful. God made us for happiness.
The Sorrowful Mysteries teach that sin is what makes this life a vale of tears. Doing our will instead of God's will is the path to sorrow.
The Glorious Mysteries teach that life has a purpose, a goal beyond this life. Life is linear. Our destiny is heaven, a glorious life beyond this life.
The Luminous mysteries sheds light on an important aspect of Christ's mission: He is son of the Father, the miracle worker, announcer of the Kingdom, the transfigured Son of god, and living bread or Eucharistic presence. He is God's light for this world