The author addresses the revival and misuse of stained glass in churches, cautioning that fashion and commercial pressures can produce inappropriate memorials. He urges clergy, vestries, and donors to educate themselves and to oversee commissions with informed taste. Practical principles are set out: stained glass should function foremost as window and light, preserve architectural proportion and the building’s style, avoid pictorial spectacle, and respect original openings. The essay pairs these guidelines with a parish report describing the implementation of a consistent decorative scheme that produced several new windows and mosaics following the recommended approach.