Some days, he doesn't sound convincing to himself. So, he repeats the statement as often as needed until the benediction opens through his heart and he affirms the day yet again. Notice he is affirming to rejoice in the day, no matter what it brings. This isn't to deny he may sometimes feel loss, anxiety, longing or any of the nuances of love and fear of which we as humans are capable. This elegant statement simply affirms his faith that all life is a key to the door of the infinite.
All experiences are opportunities to extend either love or fear.
Much of the Workbook for Students section of A Course in Miracles is based upon the principle of affirmations. Often, the lesson is a short affirmation to repeat, with and without contemplation, several times a day. I could see peace instead of this. To love yourself is to heal yourself. I'm never upset for the reason I think.