Integrity

To be undone means to come apart at the seams, to be unraveled. What Isaiah was expressing is what modern psychologists describe as the experience of personal disintegration. To disintegrate means exactly what the word suggests, dis integrate. To integrate something is to put pieces together in a unified whole. When schools are integrated, children from two different races are placed together to form one student body. The word integrity comes from this root, suggesting a person whose life is whole or wholesome. In modern slang we say, "He's got it all together".

RC Sproul, The Holiness of God, p.43