Apposition. By means of the addition of words or phrases of like natures, we illustrate and explain; as,
The hardest chemist, the severest analyzer, scornful of all but the driest fact, is forced to keep the poetic curve of nature, and his result is like a myth of Theocritus.[1]
—Emerson
“The severest analyzer” is employed to explain what “the hardest chemist” is, therefore the two phrases are in apposition. This form of construction is often used in explaining who persons are; as,
I, Henry V, King of England, etc.
All these terms are in apposition and should receive the same inflection, because identity of inflection conveys similarity of thought. Here is another good example of apposition:
Identity of law, perfect order in physics, perfect parallelism between the laws of nature and the laws of thought exist.
—Emerson
emphasis
What is emphasis? Any impressive utterance that arrests the attention of the listener.