For those who are asking for unbiblical things by Catholics, on top my head are the Rosary,
Praying the rosary is a devotion…not a doctrine or discipline…and there is nothing “unbiblical” about meditating on twenty events from the life of Jesus while praying the prayer that He taught us (the Our Father) or quoting the angel’s words at the Annunciation (in the Hail Mary).
We can pray however we choose to do so. The rosary just happens to be an effective method of prayer, but it’s not required of anyone.
Holy water is a sacramental…something that serves as a reminder…in this case, of our baptism.
A monstrance is simply a container which holds the consecrated host.
Scripture tells us that they do.
The Saints Can Hear Our Prayers Proved From Scripture
- Jesus teaches from the Old Testament
“Have you not read in the book of Moses, in the account of the bush, how God said to him, ‘I am the God of Abraham, the God of Isaac, and the God of Jacob’? He is not the God of the dead, but of the living. You are badly mistaken!” (Mark 12:26-27)
In this teaching, Jesus tells us plainly that the Father is the God of the living.
- Speaking with the “Dead” - Jesus teaches by parable
"There was a rich man who was dressed in purple and fine linen and lived in luxury every day. At his gate was laid a beggar named Lazarus, covered with sores and longing to eat what fell from the rich man’s table. Even the dogs came and licked his sores. "The time came when the beggar died and the angels carried him to Abraham’s side. The rich man also died and was buried. In hell, where he was in torment, he looked up and saw Abraham far away, with Lazarus by his side. So he called to him, ‘Father Abraham, have pity on me and send Lazarus to dip the tip of his finger in water and cool my tongue, because I am in agony in this fire.’ But Abraham replied, ‘Son, remember that in your lifetime you received your good things, while Lazarus received bad things, but now he is comforted here and you are in agony. And besides all this, between us and you a great chasm has been fixed, so that those who want to go from here to you cannot, nor can anyone cross over from there to us.’ He answered, ‘Then I beg you, father, send Lazarus to my father’s house, for I have five brothers. Let him warn them, so that they will not also come to this place of torment.’ Abraham replied, ‘They have Moses and the Prophets; let them listen to them.’ ‘No, father Abraham,’ he said, ‘but if someone from the dead goes to them, they will repent.’ He said to him, ‘If they do not listen to Moses and the Prophets, they will not be convinced even if someone rises from the dead.’”(Luke 16:19-31)
In this parable, Jesus has two of the “dead” characters in his story talking with one another, and one of the “dead” men intercedes on behalf of his living relatives.
- Speaking with the “Dead” - Jesus teaches by personal example
“After six days Jesus took with him Peter, James and John the brother of James, and led them up a high mountain by themselves. There he was transfigured before them. His face shone like the sun, and his clothes became as white as the light. Just then there appeared before them Moses and Elijah, talking with Jesus.” (Matthew 17:1-3)
At the transfiguration, Jesus was talking with two “dead” people, Moses and Elijah. They’re actually alive, though. Of course, as God, Jesus did not need to speak face to face with Moses and Elijah, but because Jesus was also fully human, it makes sense that they would appear to him in a way that his human senses could understand.
- Speaking to the dead – Peter teaches by example
“Peter sent them all out of the room; then he got down on his knees and prayed. Turning toward the dead woman, he said, “Tabitha, get up.” She opened her eyes, and seeing Peter she sat up. He took her by the hand and helped her to her feet. Then he called the believers and the widows and presented her to them alive.” (Acts 9:40-41)
- Those in Heaven Hear Our Prayers - John teaches through prophetic revelation
“He came and took the scroll from the right hand of him who sat on the throne. And when he had taken it, the four living creatures and the twenty-four elders fell down before the Lamb. Each one had a harp and they were holding golden bowls full of incense, which are the prayers of the saints.” (Revelation 5:7-8)
The 24 elders in heaven are men, and notice that they each have a golden bowl full of the prayers of the saints. That’s us since we’re all saints! So, how did they get hold of our prayers in order to offer them to God?
“Another angel, who had a golden censer, came and stood at the altar. He was given much incense to offer, with the prayers of all the saints, on the golden altar before the throne.” (Revelation 8:3)
Here, an angel also offers our prayers along with incense.
