Treasury of Scripture Knowledge
[And] I will give you the keys of the kingdom of heaven [i.e., for opening up the way into it]. And whatever [truth] you [and the other apostles. See 18:18] require [people to believe and practice] here on earth will have already been required of them [by God] in heaven. And whatever [truth] you do not require [of people] on earth, will not be required [by God] in heaven."
Whosever sins you forgive, they will be forgiven [by God]. And whosever sins you do not forgive, they will not be forgiven [by God]." [Note: Actual forgiveness would result only when people responded, by faith, to the Gospel message. See Acts 2:37-38].
This is what they wrote [in the letter]: "[This is] from your brothers, the apostles and elders [of the Jerusalem church]: Greetings to [our] Gentile brothers in Antioch, Syria and Cilicia.
1 Corinthians 5:4
[I command you], when you people are assembled together, with my spirit [also present], in the name [i.e., by the authority] and power of our Lord Jesus,
2 Corinthians 2:10
Now whomever you forgive [for doing] anything [wrong], I will forgive also. For indeed, whatever I have forgiven, if I have [actually] forgiven anything, has been for your sakes in the sight of Christ. [Note: Paul seems to be saying "Since my forgiveness depends on your forgiveness of the man, I am not sure of my forgiveness because I am not sure of yours"].
"And write [this] to the angel of the church at Philadelphia: These are the words of Him who is holy and true, [and] who possesses the key [i.e., the power and authority] of King David, [and] who opens [a door] which no one will close, and who closes one that no one will open: