The basis of Holy Qurbana is the service done with bread and wine by our Lord before his disciples on the eve of the crucifixion. The chief celebrant of the service was Lord himself. Later the bishops and priests became the celebrants. In olden days all people assembled together every day at any time. (Acts 2:46). There after the practice was turned to the morning on the first day of the week. (Acts 20:7). They usually conducted the worship by reading and meditating Bible portions suitable for the day and by singing songs bringing to mind the songs of the angels of heaven and by declaring that they do remember the death of Christ on the cross and the resurrection thereupon and their eagerness to look forward to the last Second Coming. The worship got the different form and shape by the inspiration of the Holy Spirit, strictly, following the foot steps of the worship of angels of heaven as described in the sixth chapter of Isaiah and from the intuition received from the various parts of the Book of Revelation. Hence the present form achieved.