Grammatically Correct: The writer's essential guide to punctuation ...

Capitalization
Capital letters are used for more than just starting sentences and
names. Their functions fall into two main categories:
• Creative uses-achieving certain tones and emphases
• Conventional uses-starting sentences and acting to set off
important entities
CREATIVE USES OF CAPITAL LETTERS
Capital letters were once much more a part of writing than they are
today. A couple of centuries ago, it was common for most nouns in
English to be capitalized.
I now began to be weary, and seeing nothing to entertain my
Curiosity, I returned gently down towards the Creek; and the Sea being
full in my View, I saw our Men already got into the Boat, and rowing
for Life to the Ship. I was going to hollow after them, although it had
been to little purpose, when I observed a huge Creature walking after
them in the Sea, as fast as he could: He waded not much deeper than
his Knees, and took prodigious strides: But our Men had the start of
him half a League, and the Sea thereabouts being full of sharp pointed
Rocks, the Monster was not able to overtake the Boat.
-joNATHAN SwiFT, Gulliver's Travels
Modern writing is not quite as liberal with capitals, but makes
occasional use of them to add humor or irony.
266
'You mean you missed me?' said Berry hungrily. 'Do you mean you
missed me?'