Sacred numbers played a vital role in the era of Jesus as they held a symbolic and holy meaning to them. Biblical numerology is commonly called western numerology as it implemented widely across the English and catholic countries. The numerology that first originated by the Greeks contradicted the beliefs of Christians which lead to the creation of biblical numerology.
It is the sacred testimony number. There is a rule in Christianity that there must be two witnesses to authenticate a testimony. It holds an assurance to god. It is claimed that in Revelation 11, the two witnesses were made to represent the whole Church to fight against injustice.
Three is the number that defines perfection for Christians. The numbers have superlative force in the last of every series of the bible. There are three temptations of Christ (Matthew 4:1 -11 and parallels) and three denials of Peter (John 18:13-27 and parallels).
In Jewish tradition, there must be three major feasts according to Exodus 23:14-19. Bible says prayers must be done three times in a day as it is believed that God will hear your sincerity. The sacrifices that were made in the Christian culture required three-year-old animals. It is a sin if you kill animals that aren’t three years old.
Christians celebrate three major festivals in the Easter Triduum. Easter Triduum is a three-day festival that begins with the liturgy on the evening of Maundy Thursday followed by the highest point in the Easter vigil and finishes with the evening prayer on Easter Sunday. This is the day that is celebrated worldwide as Easter. Good Friday is a part of Easter Triduum.
Three is the number that is linked with both the divine and the devil side of God. In the book of Revelation, God is named as the one who is, who was and who is to come. While the beast or the devil form of god is named as the one who was, is not and is not to come. The divineness of Christ is always chanted three times, “Holy, holy, holy.”
Three and a half:
This is the broken seven; it signifies weakness and depression. It’s derived from Daniel 7:25 and 12:7, where “a time, two times, and half a time” or “time, times, and a half” designates a phase or a time that emphasizes on the oppression and corresponds to almost the temple’s desecration under Antiochus IV Epiphanes, the great (167-164 BCE). Within the Book of Revelation, three and a half maybe a numerical cipher for the in-between times, the time between Jesus’ ascension to heaven and his return at the top aged to defeat evil.  Other variants of three and a half occur in Revelation, for instance, forty-two months (Rev. 11:2; 13:5);
It represents the sense of totality and symbolizes the circle of life. there are four living creatures representing the creation of god in the Revelation. Even humanity is divided into four divisions, tribe, language, people and nation”. There are four corners of the earth the god protects people from harm, north, south, East, and West.
The New Jerusalem that was created later has four sides as it is called the new earth. The altar of the church has four corners and four pillars.
Six is the number that represents imperfection, evil. The beast number 666 is considered completely unlucky and satanic. The number is avoided by many Christians and they don’t take anything numbered 6. It is considered unholy.
Seven is the holy number of the bible. The god created seven days in a week and seven days of creation. There are seven sacraments in all Catholicism scripts. Seven is a holy number that is constantly repeated. In the book of Revelation, there are seven seals, seven holy churches, seven bowls, seven trumpets, seven thunders, seven spirits, seven sacred stars, and seven traditional lampstands.
The holy lamp has seven eyes and horns while the dragon has seven heads and seven diadems in the revelation. Even the evil beast has seven heads. Seven is the holiest number of Christians.
Number eight is used by Christians to mark the new house or the new venture. There were eight people on Noah’Ark and the circumcision took place on the eight-day. Jesus died on the sixth day and rose from the dead on the eighth day. The eight-day of the week are the new week.