SOURCE: THE OLD ORTHODOX PRAYER BOOK Let this also be known: It behooves every Christian to know how to cross himself properly in the form of a cross; how great of a mystery lies in joining of fingers; and why we are called Christians. Let everyone born again in the laver of regeneration mark this well, lest unbelievers laugh or mock us, and lest heretics overcomes us in argment and put us to shame with their unclean words. Truly, the Lord had mercy and has not despised us, but rather He has looked upon us mercifully from His holy place on high, and given us a new name; that is, to be called Christians. ...Behold, then, how we Christians are called by a new name, just as He saud through the same Isaiah to his new servents, "And they shall come and see My glory. And I will leave a sign apon them."(Isa 66:18-19) And as the Lord said, so has He done; He has left as Sign, the precious Cross... ...It is also clear from other witnesses: that the Apostles of Christ, as well as the martyrs, made thesign of the precious Cross upon themselves with their hands. Therein, says the holy fathers, us glorified the mystery of the holy and undivided Trinity, the Father, the Son, and the Holy Spirit. In Holy Baptism, the three-day burial and Resurrection of Christ is shown by three immersions in water; as the Apostles says, "So many of us as were baptised into Jesus Christ were baptised into death." And further: "That like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life."(Rom 6:3,4).