According to Emerson, a fully realized person is when we follow our own conscience. " that diving idea " what ... trust thyself every heart vibrates to that iron string ". Strong if you trust thyself.
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Tone and mood are often confused, so now would be a good time to make sure you understand the difference between the two. If tone is the author's attitude toward a subject, then mood is how we are made to feel as readers, or the emotion evoked by the author.