The conclusion to the first half of Ephesians is a prayer for believers to have strength to know Christ’s love.
Although it is impossible to say what is the best thing about being a Christian, the theme of Galatians 4:1-7 is an excellent candidate...
To those who try to impose their own rules on all Christians we should just say “No!”
The Parable of the Banquet illustrates the various responses to the generous invitation of the King.