The subject of "holiness" has not received much attention, particularly with reference to Colossians. The aim of this study is to explore the significance of the use of holiness language, echoes, and allusions in the Epistle to the Colossians. This study also seeks to establish the value of such holiness texts for the interpretation of the epistle. The word ἅγιος is examined particularly with reference to its occurrences in the Epistle to the Colossians.