The Apostle Paul
2 Corinthians 1:22BSB·traditional attribution

placed His seal on us, and put His Spirit in our hearts as a pledge of what is to come.

Matthew Henry Presbyterian @wholebiblehenry

The apostle here vindicates himself from the imputation of levity and inconstancy, in that he did not hold his purpose of coming to them at Corinth. His adversaries there sought all occasions to blemish his character, and reflect upon his conduct; and, it seemed, they took hold of this handle to reproach his person and discredit his ministry. Now, for his justification, I.

Commenting on 2 Corinthians 1:15-24

John Gill Reformed Baptist @doctorgill

Who hath also sealed us,.... "Two" things more are here attributed to God; "first", the sealing of his people. The use of seals is various, as to denote property in things, to distinguish one thing from another, to show esteem and affection for persons or things, and for security and protection, and to hide and conceal; all which might be applied to sealing, as expressive...

Albert Barnes Presbyterian @notesbybarnes

Verse 22. Who hath also sealed us. The word used here (from σφραγιζω) means, to seal up; to close and make fast with a seal, or signet--as, e.g., books, letters, etc., that they may not be read. It is also used in the sense of setting a mark on anything, or a seal, to denote that it is genuine, authentic, confirmed, or approved--as when a...