Really good video explaining the differences between Eastern Orthodoxy and Roman Catholicsm

[Jude1:3Contendforthefaith]

 

[Michael Snow]

schism /ˈsɪzəm/ SIZ-əm

Break 'Chalcedon' down into sounds: [KAL] + [SI] + [DUHN] - say it out loud and exaggerate the sounds until you can consistently produce them.
SI is See