1 Thessalonians 1:4

Knowing, brethren beloved, your election of God.

Paul knew the election of God belonging to the believers, keeping it in remembrance with gratitude and addressing them as beloved brethren. That knowledge was joined to prayerful thanks for their work of faith and labor of love and patience of hope in Jesus Christ. Their election was shown in their turning from error and idols to serve the living God. It was further shown in remaining faithful to the truth and holding firmly to the message they had proclaimed, and such faithfulness gives reason for thanksgiving and praise to God.