John — whose surname “Chrysostom” occurs for the first time in the “Constitution” of Pope Vigilius (cf. P.L., LX, 217) in the year 553 — is generally considered the most prominent doctor of the Greek Church and the greatest preacher ever heard in a Christian pulpit. His natural gifts, as well as exterior circumstances, helped him to become what he was.
Catholic Encyclopedia: http://www.newadvent.org/cathen/08452b.htm
Gregory +
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