1 Thessalonians 1:5-6

5for our good news [regarding salvation] came to you not only in word, but also in [its inherent] power and in the Holy Spirit and with great conviction [on our part]. You know what kind of men we proved to be among you for your benefit.

6You became imitators of us and [through us] of the Lord, after you welcomed our message in [a time of] great trouble with the joy supplied by the Holy Spirit;