Holy Baptism is a key Sacrament for the Orthodox Church, whereby one is cleansed through Divine Grace of all sins by being immersed three times in water in the Name of the Holy Trinity (Father, Son and Holy Spirit). They are reborn into a new holy and spiritual life.
Having become a member of the Church through Baptism, infants can receive Holy Communion and from the first days of their life on Earth, they can become vessels of the Holy Spirit. For as the Lord Himself said: "Let the children come to Me, and do not hinder them; for to such belongs the Kingdom of Heaven" (Mattew 19:14).
The Baptism of both adults and children takes place in the presence of sponsors (Godparents), who act as guarantors for the one being baptized. The sponsor(s) are responsible for following after the spiritual and religious upbringing of the child. Yet it is necessary to perfect oneself morally even after Baptism, and there is still the possibility to fall. In modern times, the Baptism is usually administered on or after the 40th Day after birth, when Christ was brought by His parents to the sacred Jewish Temple to fulfill Jewish tradition.
The Sacrament of Holy Baptism was instituted by Our Lord after His resurrection, when He appeared to His disciples and said: "… Go therefore and make disciples of all nations, baptizing them in the Name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you; and lo, I am with you always, to the close of the age" (Matt. 28:18-20).