Of all the attributes of God, holiness is the one that most uniquely describes Him and in reality is a summarization of all His other attributes. The word holiness refers to His separateness, His otherness, the fact that He is unlike any other being. It indicates His complete and infinite perfection. Holiness is the attribute of God that binds all the others together. Properly understood, it will revolutionize the quality of our worship.
John MacArthur