The phrase "first flush of the morning" refers to the initial moment of the day when one wakes up feeling refreshed and rejuvenated. There are many synonyms to describe this moment, including "dawn," "sunrise," "daybreak," "morn," "crack of dawn," and "early morning." Other phrases that might be used to describe this moment include "first light," "the start of a new day," or "the beginning of the morning." No matter the word choice, the moment of waking up and feeling the initial freshness of the day is a wonderful experience that is worth celebrating.