August 4, 1821 - Reverend William Blair Hired by SASU

Image Citation: AI-generated illustration by ChatGPT (OpenAI), 2026, depicting Rev. William Blair's missionary work for the Sunday and Adult School Union following his commission on August 4, 1821. Created for educational purposes.

Rev. William Blair devoted his ministry to bringing biblical education to America's rapidly expanding frontier, where churches and trained pastors were often scarce. As one of the earliest missionaries of the Sunday and Adult School Union (SASU), he traveled from settlement to settlement establishing Sunday Schools and adult Bible classes, helping communities build a foundation of Christian learning long before many had permanent congregations.

Blair officially received his commission from the Sunday and Adult School Union on August 4, 1821. He immediately embraced the demanding assignment, traveling approximately 2,500 miles on horseback during his first year alone. His ministry took him through six states, where he organized four adult schools and an astonishing sixty-one Sunday Schools despite the hardships of frontier travel.

The success of Blair's ministry quickly demonstrated the enormous need for missionary educators across the young nation. Recognizing that one man could not meet the growing demand, the Sunday and Adult School Union soon commissioned additional missionaries to expand the work. Together, they helped establish thousands of Sunday Schools and churches in communities that otherwise had little access to organized Christian instruction.

The organization continued this mission for nearly two centuries. In 2011, after approximately 190 years of ministry, the Sunday and Adult School Union changed its name to InFaith, continuing its commitment to planting churches, supporting missionaries, and sharing the gospel in underserved communities across North America.

Why it matters:

William Blair's life illustrates the enormous influence one faithful missionary can have through perseverance and obedience. His willingness to travel thousands of miles over difficult terrain helped spread biblical literacy and strengthen the Christian faith in communities across the American frontier, leaving a legacy that continues through the ministry of InFaith today.