Servant of God is a title given to individuals by various religions, but in general the phrase is used to describe a person believed to be pious in his or her faith tradition. In the Catholic Church, it designates someone who is being investigated by the Church for possible sainthood. In the Eastern Orthodox churches, this term is used to refer to any Eastern Orthodox Christian.
The expression "servant of God" appears seven times in the Bible. All four times in the old testament, and one of the three times in the new testament, it refers to "Moses the servant of God" (1Chronicles 6:49; 2Chronicles 24:9; Nehemiah 10:29; Daniel 9:11; Revelation 15:3). In the new testament, Paul calls himself "a servant of God" in Titus 1:1, and James calls himself "a servant of God" in James 1:1. Following the rules of English grammar standardized in the King James Bible, the word "servant" is never capitalized or used as a title of nobility. ("The servant is not greater than his lord.")
"Servant of God" is the title given to a deceased person of the Catholic Church whose life and works are being investigated in consideration for official recognition by the Pope and the Catholic Church as a saint in Heaven. The title "Servant of God" (Latin: Servus Dei) should not be confused with Servus Servorum Dei (Servant of the Servants of God), one of the titles of the Pope.
Receiving the title Servant of God is the first of the four steps in the canonization process. The next step is being declared Venerable, upon a decree of heroism or martyrdom by the honored. This is followed by beatification, with the title of Blessed, after the confirmation of miracles resulting from the intercession of the honored. The final step is canonization, where the honored would receive the title of Saint. The process for canonization is under the jurisdiction of the Congregation for the Causes of Saints.
A guru or sat guru in various traditions of Hinduism is given the name Dasa or  servant of God. A teacher can also called uda ka das which means the servant of the one God. In Sanskrit word dasa (IAST dāsa) means servant and this meaning is retained in all Indian languages where devotion to a personal God is practiced. In Tamil, tontai, dasa, servant, or "slave," commonly used to refer to devotees of Vishnu or Krishna. According to Gaudiya Vaishnava theology Smriti statement dāsa-bhūto harer eva nānyasvaiva kadācana, living entities (bhuto) are eternally in the service (dasa) of the Supreme Lord (Hari). Thus designation for Vaishnavas was the status title dasa as part of their names, such as Hari dasa, Narayana dasa, Ram das, Gopal das, etc.
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