Antithesis – quite a mouthful of a word. It is a figure of speech used in a single sentence in which a  person, a characteristic or a thing is stated to be the direct opposite of something or someone.

antithesis
noun
An antithesis is a figure of speech in which irreconcilable opposites or strongly contrasting ideas are placed in sharp juxtaposition and sustained tension, as in the saying “Art is long, and Time is fleeting.” 
“love is the antithesis of selfishness”.

synonyms:  (complete) opposite, converse, contrary, reverse.

quote that demonstrates the idea of antithesis:
“I sometimes struggle, because my job is the antithesis of what surfing is all about. Surfing’s simple. It’s real.”
Paul Walker, actor (brainyquote.com)

Antithesis refers to a figure of speech which demonstrates a contrast in two ideas.  These two opposing ideas are contained in a single sentence, close to one another so that the contrast of ideas in relation to each other is clear.

antithesis examples

in literature
“To err is human; to forgive divine.”  Alexander Pope.
“Give every man thy ear, but few thy voice.”  William Shakespeare.
“Many are called, but few are chosen.” Matthew 22:14.
famous quotes
“Setting foot on the moon may be a small step for a man but a giant step for mankind.” –  Neil Armstrong
song lyrics
See I love to love you boy
and I love to hate you – Kelly Rowland (Song: Love/Hate)
marketing slogans
Think globally. Act locally.

Antithesis is normally used to point out the exact opposite meaning of something.  Antithesis is a powerful literary device and is used in novels, poems, songs and quotes.By bringing opposite concepts to the fore, it can be used to great effect. Juxtaposing the contrasts compels the reader to see the subject in clearer perspective.  It is a figure of speech used in a single sentence in which a  person, a characteristic or a thing is stated to be the direct opposite of something or someone.