Read 1 Thessalonians 1:5 Using Other Translations
For our gospel came not unto you in word only, but also in power, and in the Holy Ghost, and in much assurance; as ye know what manner of men we were among you for your sake.
because our gospel came to you not only in word, but also in power and in the Holy Spirit and with full conviction. You know what kind of men we proved to be among you for your sake.
For when we brought you the Good News, it was not only with words but also with power, for the Holy Spirit gave you full assurance that what we said was true. And you know of our concern for you from the way we lived when we were with you.