William Secker has left very few personal details to posterity, but as he himself puts it in the Introduction ‘the design of this piece is not the ostentation of the author, but the edification of the reader’. It was first printed in London in 1660, and is a rare puritan sermon. Although the title is perhaps not the most illuminating, the subtitle is clearer – the singular actions of sanctified Christians. Based on Matthew 5:47, it pithily sets out Why a Christian should do more than others, and, What a Christian does more than others.