Commentaries:
Jamieson, Fausset, and Brown
in part—In contrast to "even to the end": the testimony of his life was not yet completed [THEOPHYLACT and BENGEL]. Rather, "in part," that is, some of you, not all [GROTIUS, ALFORD]. So in II Corinthians 2:5; Romans 11:25. The majority at Corinth had shown a willing compliance with Paul's directions in the first Epistle: but some were still refractory. Hence arises the difference of tone in different parts of this Epistle. See Introduction.
your rejoicing—your subject of glorying or boast. "Are" (not merely shall be) implies the present recognition of one another as a subject of mutual glorying: that glorying being about to be realized in its fulness "in the day (of the coming) of the Lord Jesus."
Other Jamieson, Fausset, and Brown entries containing 2 Corinthians 1:14:
1 Corinthians 3:14
2 Corinthians 1:13
2 Corinthians 1:15
2 Corinthians 2:5
2 Corinthians 4:14
2 Corinthians 5:12
Philippians 2:16
1 Thessalonians 2:19
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