Attitude adjustment

I am down in the dumps today, but I am trying hard to pull myself out of this funk. I did a Google search for "great day lyrics," and stumbled upon a website gem called Lyrics. It's a tool that allows users to search lyrics, artists, and album names for certain keywords. (I can foresee a ton of wasted time in my future.) So that's how I found the little nugget above from Paul McCartney. I'm not sure if I'm familiar with the song, Great Day. It's from 1997, so totally last century. And it's not even on Spotify.No bother, though...

Although I'm sleepy, I'm awake
Although I'm grumpy, there is plenty of good, for goodness sake.
Let's say it aloud together - it's gonna be a great day.