Oklahoma!

As millions know, Oklahoma! begins in light: a bright new morning, one never before seen. A woman described as "buxom" and "about 50" pauses over her butter churn to gaze out over the meadow, a "contented look" on her face. We in the audience are the meadow. Thus, I imagine, we're contented too. Expectant. Something good will come, soon.
It's a voice, a young man, from offstage. "There's a bright, golden haze on the meadow," he sings. He repeats the line, then, "The corn is as high as en elephant's eye, / An' it looks like it's climbin' clear up to the sky." 
Now the young man, Curly, saunters on. You know what comes next: 
     Oh, what a beautiful mornin', 
     Oh, what a beautiful day. 
     I got a beautiful feelin'
     Everythin's going my way.
(Here we might observe that one "beautiful" is enough, two are too many, but with the third we're back to enough. Furthermore, re rhyme, note that only the perfect rhyme works here. Try "Everythin's going to be fine.")
Maybe it will go Curly's way, maybe it won't. The play throws complications our way. But an opening like this one beguiles us, picks us up perfectly for the ride.
Here's Hugh Jackman as Curly in a 1998 London revival.