None? In secret? I must be misunderstanding you.
[2Pe 3:15-16 KJV]
15 And account [that] the longsuffering of our Lord [is] salvation; even as our beloved brother Paul also according to the wisdom given unto him hath written unto you;
16 As also in all [his] epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as [they do] also the other scriptures, unto their own destruction.
[Act 17:19-20, 22 KJV]
19 And they took him, and brought him unto Areopagus, saying, May we know what this new doctrine, whereof thou speakest, [is]?
20 For thou bringest certain strange things to our ears: we would know therefore what these things mean. ...
22 Then Paul stood in the midst of Mars' hill, and said, [Ye] men of Athens, I perceive that in all things ye are too superstitious.
[Rom 1:1, 7 KJV]
1 Paul, a servant of Jesus Christ, called [to be] an apostle, separated unto the gospel of God, ...
7 To all that be in Rome, beloved of God, called [to be] saints: Grace to you and peace from God our Father, and the Lord Jesus Christ.
[1Co 1:1-2 KJV]
1 Paul, called [to be] an apostle of Jesus Christ through the will of God, and Sosthenes [our] brother,
2 Unto the church of God which is at Corinth, to them that are sanctified in Christ Jesus, called [to be] saints, with all that in every place call upon the name of Jesus Christ our Lord, both theirs and ours:
[2Co 1:1 KJV]
1 Paul, an apostle of Jesus Christ by the will of God, and Timothy [our] brother, unto the church of God which is at Corinth, with all the saints which are in all Achaia:
[Gal 1:1-2 KJV]
1 Paul, an apostle, (not of men, neither by man, but by Jesus Christ, and God the Father, who raised him from the dead
2 And all the brethren which are with me, unto the churches of Galatia:
[Eph 1:1 KJV]
1 Paul, an apostle of Jesus Christ by the will of God, to the saints which are at Ephesus, and to the faithful in Christ Jesus:
[Phl 1:1 KJV]
1 Paul and Timotheus, the servants of Jesus Christ, to all the saints in Christ Jesus which are at Philippi, with the bishops and deacons:
[Col 1:1-2 KJV]
1 Paul, an apostle of Jesus Christ by the will of God, and Timotheus [our] brother,
2 To the saints and faithful brethren in Christ which are at Colosse: Grace [be] unto you, and peace, from God our Father and the Lord
[1Th 1:1 KJV]
1 Paul, and Silvanus, and Timotheus, unto the church of the Thessalonians [which is] in God the Father and [in] the Lord Jesus Christ: Grace [be] unto you, and peace, from God our Father, and the Lord Jesus Christ.
[2Th 1:1 KJV]
1 Paul, and Silvanus, and Timotheus, unto the church of the Thessalonians in God our Father and the Lord Jesus Christ:
ETC.