Saint Ambrose, Latin: Sanctus Ambrosius, "Ambrosius episcopus Mediolanensis"; Italian: Sant'Ambrogio; Lombard: Sant'Ambroeus) (c. 340 – 4 April 397), bishop of Milan (Mediolanum in Latin), was one of the most eminent bishops of the 4th century. Together with Augustine of Hippo, Jerome, and Gregory I, he is counted as one of the four doctors of the West of antique church history.

Sourced

• Accordingly, death is a harbor of peace for the just, but is believed a shipwreck for the wicked.
  • De bono mortis, 8, 31.

• It is not death therefore that is burdensome, but the fear of death.
  • De bono mortis, 8, 31.

• It did not please God to save his people through dialectic.
  • De fide, I, 5, 42.

• When I am at Rome, I fast on a Saturday; when I am at Milan, I do not. Follow the custom of the church where you are.
  • Quoted in St. Augustine, Epistle to Januarius, II, section 18 and Epistle to Casualanus, XXXVI, section 32

• Si fueris Romae, Romano vivito more;
  Si fueris alibi, vivito sicut ibi.
  • If you are at Rome, live in the Roman style; if you are elsewhere, live as they live there.
  • Quoted in Jeremy Taylor, Ductor Dubitantium, or the Rule of Conscience (1660), I.i.5. Compare common rendering: "When in Rome, do as the Romans do", or simply "When in Rome...", to make a proverb.

Unsourced

• In some causes silence is dangerous; so if any know of conspiracies against their country or king, or any that might greatly prejudice their neighbor, they ought to discover it.

• The emperor is in the Church, not above the Church.