Christians are not to alter the doctrines of God; they will never improve upon them, but they must and do adorn them with their holy lives and godly conduct. That is "practical godliness." In this scarse treatise, Alsop laments that the harmony of the Christian religion "has been disordered, its beauty blemished, and much filth thrown in its face." Appendixed is a rare sermon showing his wit and ability to apply Scripture entitled, "The Sinfulness of Strange Apparel." This is a biblical theology of clothing and fashions which is so relevent for Christians in our time.