My favorite Wordsquare Riddles,
Inventing them, I can't resist.
But this, with four stanzas,
There might be a twist!
My first is perfectly happy,
Featured in a song of Coldplay's.
My second is roughly a hertz,
Back in Mozart days.
My third does not empty graves.
National, personal, why not?
My fourth determines your destiny.
Also, a task of the pilot.
A bit tricky? I apologize.
The clues are obvious as can be.
For the geniuses on this site
I bet they solve this easily!
This is a Wordsquare, which is a crossword shaped like a square, and having same across and down clues. No other specification.
For the first word, it is just a word in the lyrics, not the title. To make it easier: the song has the same birth date and month as Robert Baden Powell.
I must admit that you must think laterally a bit, but I'm afraid that if I add the tag, the answers will go wild.
Underestimating the last stanza will make you fail this puzzle.