Whether therefore ye eat, or drink, or whatsoever ye do, do all to the glory of God.

— 1 Corinthians 10:31 KJV

• Do all things to the best of your ability.
• Build products that are robust, accessible, and as simple as possible.
• Products are built for users, not just to solve abstract technical problems: The most technically innovative code is worthless if the end-user experience is subpar.
• Don't write cute code.

A dog barks when his master is attacked. I would be a coward if I saw that God's truth is attacked and yet would remain silent. For if I am silent when God's truth is assailed, I shall be denying Him whom I profess to serve. As a faithful watchman, I must bark when I see the wolf coming to attack the flock.

— John Calvin, The Institutes of the Christian Religion