'When the psalmist declares that only those who have "clean hands and a pure heart" can ascend into God's presence (Psalm 24:4), he highlights the significance of the concepts of defilement and cleansing. Addressing this much-neglected topic, Dr Harper skilfully engages with its ubiquitous presence throughout the Bible. By offering new perspectives on the biblical text, this careful study enriches our understanding of the Bible. Importantly, it sheds fresh light on the scope and impact of Christ's atoning ministry, reminding readers of the necessity of engaging with the whole canon of Scripture.'