In Paul's letter to  the Corinthian Church we find great encouragement.

This church had real problems

There was intense division.

People and groups were vying for power and prestige.

There was drunkenness and gluttony during the partaking of the Lord's supper.

Some of the members were suing one another in the pagan courts.

Some of the members were frequenting prostitutes and partaking in idolatrous feasts.

One of the members was living with his fathers wife.

Yet what were Pauls opening remark's concerning these people

1Corinthians 1:1 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:

3 Grace be unto you, and peace, from God our Father, and from the Lord Jesus Christ.

4 I thank my God always on your behalf, for the grace of God which is given you by Jesus Christ;

5 That in every thing ye are enriched by him, in all utterance, and in all knowledge;6 Even as the testimony of Christ was confirmed in you:7 So that ye come behind in no gift; waiting for the coming of our Lord Jesus Christ:

8 Who shall also confirm you unto the end, that ye may be blameless in the day of our Lord Jesus Christ.

9 God is faithful, by whom ye were called unto the fellowship of his Son Jesus Christ our Lord.

Paul knew that these people were sanctified, Sanctified means holy .

He knew that they were called Saints. Saints means Holy ones.

He knew that they were enriched in Christ in word and knowledge

He knew that the message of Christ was confirmed in them and that God would confirm them unto the end so that they would be found blameless in the day of Christ

Here is the Webster's dictionary definition of the word confirm!