And besides that, though the three clauses do express the same general idea, they express it under various modifications, and must be all taken together before we get the whole of the Psalmist's thought of sin. Notice again that he speaks of his evil as 'transgressions' and as 'sin,' first using the plural and then the singular. He regards it first as being broken up into a multitude of isolated acts, and then as being all gathered together into one knot, as it were, so that it is one thing. In one aspect it is 'my transgressions'--'that thing that I did about Uriah, that thing that I did about Bathsheba, those other things that these dragged after them.' One by one the acts of wrongdoing pass before him. But he does not stop there. They are not merely a number of deeds, but they have, deep down below, a common root from which they all came--a centre in which they all inhere. And so he says, not only 'Blot out my _transgressions_,' but 'Wash me from mine _iniquity_.' He does not merely generalise, but he sees and he feels what you and I have to feel, if we judge rightly of our evil actions, that we cannot take them only in their plurality as so many separate deeds, but that we must recognise them as coming from a common source, and we must lament before God not only our 'sins' but our 'sin'--not only the outward acts of transgression, but that alienation of heart from which they all come; not only sin in its manifold manifestations as it comes out in the life, but in its inward roots as it coils round our hearts. You are not to confess acts alone, but let your contrition embrace the principle from which they come.