A man ought to live so that everybody knows he is a Christian... and most of all, his family ought to know.

Moody’s remark stresses that Christian identity is meant to be visible in conduct, not merely professed in words. The first clause—“everybody knows”—points to public witness: integrity, charity, and consistency that make faith legible to outsiders. The sharper second clause—“most of all…his family”—moves the test of authenticity into the private sphere, where reputation is hardest to curate and where daily habits are most revealing. The quote implies that religious sincerity is measured by ordinary relationships: patience at home, honesty in small matters, and love toward those who know one’s flaws. It also critiques performative piety by suggesting that the closest observers are the most reliable judges.