The subject of assurance is one of the most important elements in Christian experience. There is no higher privilege than to be a child of God and to know it, for assurance brings joy to worship and prayer, and provides strength and boldness to our witness. Correspondingly, failure and weakness in all these areas can often be traced back to a lack of assurance, or even false assurance. This work of Thomas Brooks, first published in 1654, deals with all of these aspects of assurance in a way that is both biblical and pastoral. Brooks 'scatters stars with both his hands' wrote C.H. Spurgeon. His teaching is clear, thorough and greatly needed in the present spiritual climate. Brooks both explains what true assurance is and guides the reader in how it may be fully experienced.