Joy flows from a heart that is thankful. 'For what thanks can we render to God for you in return for all the joy with which we rejoice before our God on your account' (1 Thes. 3:9). Paul was constantly expressing thanks for God's grace in the lives of believers; their faith in Him and their love for each other; praying for them 'always.' If we would know the joyful Christian life, we would do the same.