We must thank God at all times for you, friends, you whom the Lord loves. For God chose you as the first to be saved by the Spirit's power to make you his holy people and by your faith in the truth.
References for 2 Thessalonians 2:13
God called you to this through the Good News we preached to you; he called you to possess your share of the glory of our Lord Jesus Christ.
So then, our friends, stand firm and hold on to those truths which we taught you, both in our preaching and in our letter.