Between the 1960s and 2010s, yoga became a familiar feature of American culture, including its Christian subcultures. This article examines Christian yoga and public-school yoga as windows onto the fraught relationship between Christianity and culture. Yoga is a flashpoint for divisions among Christians and between them and others. Some evangelicals and pentecostals view yoga as idolatry or an opening to demonic spirits; others fill gaps in Christian practice by using linguistic substitution to Christianize yoga. In 2013, evangelical parents in California sued the Encinitas Union School District (EUSD) for promoting Hinduism through Ashtanga yoga. Sedlock v. Baird's failure to dislodge yoga exposes tensions in Christian anti-yoga and pro-yoga positions that stem from a belief-centered understanding of religion, the dissatisfaction of many Americans with Protestant dominance in cultural institutions, and a broad-based pursuit of moral cultivation through yoga spirituality. I argue that, although many evangelicals feel like an embattled minority, they are complicit in cultural movements that marginalize them. Naïveté about how practices can change beliefs may undercut Christian doctrines, facilitate mandatory yoga and mindfulness meditation in which public-school children and teachers are required to participate, and impede evangelistic goals by implicating Christians in cultural appropriation and cultural imperialism.