Commentaries:
Robertson's Word Pictures (NT)
First of all (prwton men). There is no antithesis (deuteron de, secondly, or epeita de, in the next place) expressed. This is the primary reason for Paul's condemnation and the only one given.
When ye come together in the church (sunerxomenwn hmwn en ekklhsiai). Genitive absolute. Here ekklhsia has the literal meaning of assembly.
Divisions (sxismata). Accusative of general reference with the infinitive uparxein in indirect discourse. Old word for cleft, rent, from sxizw. Example in papyri for splinter of wood. See on I Corinthians 1:10. Not yet formal cleavages into two or more organizations, but partisan divisions that showed in the love-feasts and at the Lord's Supper.
Partly (merov ti). Accusative of extent (to some part) like panta in I Corinthians 10:33. He could have said ek merouv as in I Corinthians 13:9. The rumours of strife were so constant (I keep on hearing, akouw).
Other Robertson's Word Pictures (NT) entries containing 1 Corinthians 11:18:
Romans 1:8
Romans 3:2
Romans 11:25
1 Corinthians 1:10
2 Thessalonians 3:11
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