A man vacationing in Hawaii noticed that the colors of the daily rainbows always appeared in the same order. Why? He Googled his question. Soon, he was watching a video of Professor Walter Lewin at MIT—a teacher famously in love with physics.

Bounding across the stage, Lewin explained the “amazing” and “beautiful” physics of rainbows. Colors repeat order, he said, as light refracts and reflects in water droplets. Suddenly, the man saw the same world with new eyes.

This is Howard Butt Jr. of Laity Lodge. A good teacher loves a subject so much that you love it too. The next time you see a rainbow, thank God for good teachers … in the high calling of our daily work.

“Never be lacking in zeal , but keep your spiritual fervor, serving the Lord.”— Romans 12:11