Charles Spurgeon Commentary 1 Corinthians 1:1-3

"Paul, called [to be] an apostle of Jesus Christ through the will of God, and Sosthenes our brother, unto the church of God which is at Corinth, [even] them that are sanctified in Christ Jesus, called [to be] saints, with all that call upon the name of our Lord Jesus Christ in every place, their [Lord] and ours: Grace to you and peace from God our Father and the Lord Jesus Christ." — 1 Corinthians 1:1-3 (ASV)

Paul, called to be an apostle of Jesus Christ through the will of God, and Sosthenes our brother, to the church of God which is at Corinth, to those who are sanctified in Christ Jesus, called to be saints, with all who in every place call upon the name of Jesus Christ our Lord, both theirs and ours: Grace to you, and peace, from God our Father, and from the Lord Jesus Christ.

So this is a message to us also who call upon the name of Jesus Christ our Lord.