The Buddha's Silence of Hindrances in the Mind

Second simile suggests the underlying emotional tone, both of being caught up in the hindrance and also those times when we're free of them. When it's tossed about, when it's filled with agitation, at that time also it obscures our clear seeing. And doubt is like when the water is muddy and everything is obscured. You can see how these hindrances as they operate in the mind, alter and condition our perception of what it is that's arising.