The summary of this text is that;
Ralph Waldo Emerson was a philosopher and essayist who enjoyed solitude and recommended some moral etiquettes.
One of these etiquettes is self-reliance. In this excerpt, Emerson likens humans to an eye that was placed so that a ray could fall on it. This eye can testify of the ray.
This shows that we were created purposefully. We have also been blessed with talents. Cowards hide their own talents. We should not be cowards, rather, we should courageously express the gifts that we possess.
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