電影《關鍵少數》（Hidden Figures，或譯《隱藏人物》）講述了太空人葛倫上校在進入太空之前的準備。在1962年，電腦還是一項新發明，經常發生故障。因此，葛倫上校不相信電腦，擔心發射太空船的數據有問題。但他知道在後面的辦公室裡，有個聰明的女人會運算這些數字。葛倫信任她，並說：「如果她說這些數據沒問題，那我就可以出發了。」

葛倫口中那「聰明的女人」就是凱薩琳‧強森。她是一位教師，也是三個孩子的母親。她愛耶穌並在教會服事，上帝賜給她超凡的心智。在1950年代後期，美國太空總署發掘她，請她協助太空計劃，而她也是太空總署的「人體計算機」之一。

我們或許沒有被呼召成為聰明絕頂的數學家，但上帝對我們有別的呼召，因「我們各人蒙恩，都是照基督所量給各人的恩賜」（以弗所書4章7節），所以我們「行事為人就當與蒙的恩相稱」（1節），我們都同屬一個身體，每個部位都當各盡其職（16節）。

凱薩琳的運算證實了飛行軌跡，使葛倫的太空船毫釐不差地進入航道。但這只是她領受的呼召之一，她也受呼召成為母親、教師和教會同工。那上帝對我們的呼召是什麼呢？是做大事還是小事？我們是否已經可以出發了，使用上帝賦予的恩賜，過一個「與蒙的恩相稱」（1節）的生活呢？

The book Hidden Figures recounts preparations for John Glenn’s flight into space. Computers were newfangled inventions in 1962, subject to glitches. Glenn didn’t trust them and worried about calculations for the launch. He knew one brainy woman in the back room could run the numbers. He trusted her. “If she says the numbers are good,” Glenn said, “I’m ready to go.”

Katherine Johnson was a teacher and mother of three. She loved Jesus and served in her church. God had blessed Katherine with a remarkable mind. NASA tapped her in the late 1950s to help with the space program. She was Glenn’s “brainy woman,” one of the “human computers” they hired at the time.

We may not be called to be brilliant mathematicians, but God calls us to other things: “To each one of us grace has been given as Christ apportioned it” (Ephesians 4:7).  We’re to “live a life worthy of the calling” we’ve received (v. 1). We’re part of one body, in which “each part does its work” (v. 16).

Katherine Johnson’s calculations confirmed the course trajectory. Glenn’s launch into orbit was like “hitting a bull’s-eye.” But this was just one of Katherine’s callings. Remember, she was called also to be a mother, teacher, and church worker. We might ask ourselves what God has called us to, whether big or small. Are we “ready to go,” exercising the grace-gifts He’s bestowed, living “a life worthy of [our] calling” (v. 1)?