John Calvin's Commentary on the Bible - 1 Corinthians 1:1
Verse 1 1.Paul, called to be an Apostle In this manner does Paul proceed, in almost all the introductions to his Epistles, with the view of procuring for his doctrine authority and favor. The former he secures to himself from the station that had been assigned to him by God, as being an Apostle of Christ sent by God; the latter by testifying his affection towards those to whom he writes. We believe much more readily the man whom we look upon as regarding us with affection, and as faithfully... read more
Adam Clarke's Commentary on the Bible - 1 Corinthians 1:4
For the grace - which is given you - Not only their calling to be saints, and to be sanctified in Christ Jesus; but for the various spiritual gifts which they had received, as specified in the succeeding verses. read more