The Catechism in Questions & Answers

681. What is it that causes the believers to attend the divine services regularly?

Believers desire to worship God in fellowship with one another. They know that their faith and hope in the imminent return of Christ will be strengthened through the sermon in the divine service. They allow themselves to be prepared for this event in every divine service. Furthermore, they have a longing to have their sins forgiven and receive Holy Communion. Beyond that, they are blessed in the divine service.