1 Thessalonians 1:5

1:5 in that our gospel did not come to you merely in words, but in power and in the Holy Spirit and with deep conviction (surely you recall the character we displayed when we came among you to help you).

1 Thessalonians 2:1

Paul’s Ministry in Thessalonica

2:1 For you yourselves know, brothers and sisters, about our coming to you – it has not proven to be purposeless.

1 Thessalonians 2:13

2:13 And so we too constantly thank God that when you received God’s message that you heard from us, you accepted it not as a human message, but as it truly is, God’s message, which is at work among you who believe.