Challies, Tim. Do More Better: A Practical Guide to Productivity. Challies, 2015. Kindle file
Productivity is effectively stewarding your gifts, talents, time,
energy, and enthusiasm for the good of others and the glory of God.
Productivity calls you to direct your whole life at this great goal of
bringing glory to God by doing good for others.- page 16
Your purpose: to glorify
God by doing good to others. There is no better plan and no higher
ideal. - page 18