Food Fight ©Judi Birnberg
If you’d like a list of rules governing when to capitalize a letter, use the search box and put in Capitalization Rules. I posted the list a little over a year ago.
I just want to add that although a word may have special significance for you, your response won’t be universal: Exercise will fill you with Joy and Energy. When you finish your 75 pushups, you may be elated and buzzing with verve. Nevertheless, joy and energy are nothing more than ordinary, common nouns. They aren’t official names of anything (proper nouns) and should not be capitalized.
As I wrote in my previous post about capital letters,
Be very sparing in using capitalization for emphasis. Let your words show the emphasis. As with any form of calling attention to your message (e.g., bold, italics, underlining), when you emphasize everything you end up emphasizing nothing.