1 Timothy 2:7 KJV
Whereunto I am ordained a preacher, and an apostle, (I speak the truth in Christ, and lie not;) a teacher of the Gentiles in faith and verity.
There are two ways a person can view the last phrase of this verse:
The apostle was a teacher of the Gentiles "in faith and verity."
Meaning he accepted his calling by faith and was in truth a teacher of the Gentiles
Paul's ministry was challenged by the Jews, the Gentiles and by a significant number of believers. Still Paul insisted that he was in fact an apostle. He was in fact personally called and set apart for this work by the Lord. He was in fact the twelfth of the twelve.
Meaning that his teaching ministry to the Gentiles focused on two subjects:
Faith; the faith that saves, the practice of that faith in daily living.
Truth; verity is another form of the word. Another word would be doctrine; the truths upon which faith is built. Genuine faith cannot stand on anything short of truth. While faith is not sight, neither is it without substance. Faith thrives on the truths of the Bible. Give a person faith but neglect to give him doctrine and he will soon wither in the heat of testing.
Biblical ministries are built upon faith and verity.